/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/chl/name-comparator-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:38:01,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:38:01,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:38:01,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:38:02,058 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 19:38:02,095 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:38:02,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:38:02,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:38:02,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:38:02,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:38:02,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:38:02,099 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:38:02,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:38:02,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:38:02,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:38:02,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:38:02,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:38:02,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:38:02,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:38:02,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:38:02,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:38:02,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:38:02,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:38:02,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:38:02,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:38:02,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:38:02,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:38:02,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:38:02,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:38:02,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:38:02,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:38:02,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:38:02,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:38:02,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:38:02,103 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:38:02,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:38:02,103 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:38:02,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:38:02,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:38:02,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:38:02,478 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:38:02,479 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:38:02,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-symm.wvr.bpl [2021-07-13 19:38:02,479 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-symm.wvr.bpl' [2021-07-13 19:38:02,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:38:02,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:38:02,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:38:02,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:38:02,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:38:02,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/1) ... [2021-07-13 19:38:02,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/1) ... [2021-07-13 19:38:02,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:38:02,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:38:02,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:38:02,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:38:02,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/1) ... [2021-07-13 19:38:02,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/1) ... [2021-07-13 19:38:02,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/1) ... [2021-07-13 19:38:02,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/1) ... [2021-07-13 19:38:02,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/1) ... [2021-07-13 19:38:02,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/1) ... [2021-07-13 19:38:02,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/1) ... [2021-07-13 19:38:02,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:38:02,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:38:02,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:38:02,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:38:02,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (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 19:38:02,660 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:38:02,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:38:02,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:38:02,661 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:38:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:38:02,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:38:02,661 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:38:02,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:38:02,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:38:02,662 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 19:38:03,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:38:03,005 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 19:38:03,007 INFO L202 PluginConnector]: Adding new model name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:38:03 BoogieIcfgContainer [2021-07-13 19:38:03,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:38:03,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:38:03,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:38:03,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:38:03,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:38:02" (1/2) ... [2021-07-13 19:38:03,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30172435 and model type name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:38:03, skipping insertion in model container [2021-07-13 19:38:03,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:38:03" (2/2) ... [2021-07-13 19:38:03,013 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-symm.wvr.bpl [2021-07-13 19:38:03,030 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:38:03,030 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:38:03,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:38:03,030 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:38:03,086 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:38:03,105 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:38:03,120 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:38:03,120 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:38:03,120 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:38:03,121 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:38:03,121 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:38:03,121 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:38:03,121 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:38:03,121 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:38:03,129 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-07-13 19:38:03,145 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 19:38:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 19:38:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:38:03,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:03,155 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:03,155 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1618380568, now seen corresponding path program 1 times [2021-07-13 19:38:03,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:03,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877525246] [2021-07-13 19:38:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:03,437 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 19:38:03,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:03,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877525246] [2021-07-13 19:38:03,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877525246] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:03,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:03,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:38:03,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754042879] [2021-07-13 19:38:03,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:38:03,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:38:03,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:03,459 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:03,584 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2021-07-13 19:38:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:03,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:38:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:03,595 INFO L225 Difference]: With dead ends: 60 [2021-07-13 19:38:03,595 INFO L226 Difference]: Without dead ends: 45 [2021-07-13 19:38:03,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-13 19:38:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-07-13 19:38:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-07-13 19:38:03,631 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 12 [2021-07-13 19:38:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:03,631 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-07-13 19:38:03,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-07-13 19:38:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:38:03,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:03,633 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:03,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:38:03,633 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:03,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1005020504, now seen corresponding path program 2 times [2021-07-13 19:38:03,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:03,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141194011] [2021-07-13 19:38:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:03,825 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 19:38:03,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:03,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141194011] [2021-07-13 19:38:03,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141194011] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:03,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:03,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:38:03,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534219871] [2021-07-13 19:38:03,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:38:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:03,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:38:03,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:03,833 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:03,963 INFO L93 Difference]: Finished difference Result 58 states and 105 transitions. [2021-07-13 19:38:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:03,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:38:03,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:03,965 INFO L225 Difference]: With dead ends: 58 [2021-07-13 19:38:03,965 INFO L226 Difference]: Without dead ends: 48 [2021-07-13 19:38:03,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-07-13 19:38:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-07-13 19:38:03,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-07-13 19:38:03,979 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-07-13 19:38:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:03,980 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-07-13 19:38:03,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-07-13 19:38:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:38:03,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:03,982 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:03,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:38:03,983 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:03,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1566097466, now seen corresponding path program 3 times [2021-07-13 19:38:03,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:03,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928398183] [2021-07-13 19:38:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:04,114 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 19:38:04,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:04,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928398183] [2021-07-13 19:38:04,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928398183] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:04,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:04,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:38:04,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947884392] [2021-07-13 19:38:04,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:38:04,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:04,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:38:04,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:04,119 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:04,232 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2021-07-13 19:38:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:04,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:38:04,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:04,235 INFO L225 Difference]: With dead ends: 67 [2021-07-13 19:38:04,236 INFO L226 Difference]: Without dead ends: 60 [2021-07-13 19:38:04,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-07-13 19:38:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2021-07-13 19:38:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-07-13 19:38:04,254 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2021-07-13 19:38:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:04,255 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-07-13 19:38:04,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-07-13 19:38:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:38:04,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:04,256 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:04,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:38:04,256 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:04,257 INFO L82 PathProgramCache]: Analyzing trace with hash 602481210, now seen corresponding path program 1 times [2021-07-13 19:38:04,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:04,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046919244] [2021-07-13 19:38:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:04,316 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 19:38:04,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:04,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046919244] [2021-07-13 19:38:04,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046919244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:04,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294619817] [2021-07-13 19:38:04,316 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 19:38:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:04,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:38:04,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:04,419 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 19:38:04,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294619817] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:04,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:04,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-07-13 19:38:04,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272673505] [2021-07-13 19:38:04,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:38:04,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:38:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:04,421 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:04,469 INFO L93 Difference]: Finished difference Result 59 states and 112 transitions. [2021-07-13 19:38:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:38:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:04,470 INFO L225 Difference]: With dead ends: 59 [2021-07-13 19:38:04,470 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 19:38:04,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:04,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 19:38:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-07-13 19:38:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-07-13 19:38:04,475 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 13 [2021-07-13 19:38:04,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:04,475 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-07-13 19:38:04,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-07-13 19:38:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:38:04,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:04,476 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:04,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:04,701 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1691964264, now seen corresponding path program 2 times [2021-07-13 19:38:04,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:04,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199437177] [2021-07-13 19:38:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:04,761 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 19:38:04,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:04,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199437177] [2021-07-13 19:38:04,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199437177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:04,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451899158] [2021-07-13 19:38:04,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:04,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:04,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:38:04,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:04,862 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 19:38:04,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451899158] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:04,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:04,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-07-13 19:38:04,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432734397] [2021-07-13 19:38:04,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:38:04,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:04,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:38:04,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:04,864 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:04,913 INFO L93 Difference]: Finished difference Result 66 states and 122 transitions. [2021-07-13 19:38:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:04,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:38:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:04,915 INFO L225 Difference]: With dead ends: 66 [2021-07-13 19:38:04,915 INFO L226 Difference]: Without dead ends: 66 [2021-07-13 19:38:04,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-13 19:38:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2021-07-13 19:38:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 83 transitions. [2021-07-13 19:38:04,919 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 83 transitions. Word has length 13 [2021-07-13 19:38:04,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:04,919 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 83 transitions. [2021-07-13 19:38:04,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 83 transitions. [2021-07-13 19:38:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:38:04,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:04,920 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:05,144 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1360970772, now seen corresponding path program 3 times [2021-07-13 19:38:05,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784168798] [2021-07-13 19:38:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,191 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 19:38:05,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784168798] [2021-07-13 19:38:05,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784168798] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:38:05,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402412535] [2021-07-13 19:38:05,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:38:05,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:38:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:38:05,193 INFO L87 Difference]: Start difference. First operand 42 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,255 INFO L93 Difference]: Finished difference Result 62 states and 116 transitions. [2021-07-13 19:38:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:38:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:38:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,256 INFO L225 Difference]: With dead ends: 62 [2021-07-13 19:38:05,256 INFO L226 Difference]: Without dead ends: 60 [2021-07-13 19:38:05,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-07-13 19:38:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2021-07-13 19:38:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-07-13 19:38:05,260 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 13 [2021-07-13 19:38:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,260 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-07-13 19:38:05,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,260 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-07-13 19:38:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:38:05,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,261 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:38:05,261 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2069833721, now seen corresponding path program 1 times [2021-07-13 19:38:05,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188843674] [2021-07-13 19:38:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,289 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 19:38:05,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188843674] [2021-07-13 19:38:05,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188843674] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:38:05,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116832672] [2021-07-13 19:38:05,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:38:05,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:38:05,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:38:05,291 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,326 INFO L93 Difference]: Finished difference Result 62 states and 111 transitions. [2021-07-13 19:38:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:38:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,327 INFO L225 Difference]: With dead ends: 62 [2021-07-13 19:38:05,327 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 19:38:05,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 19:38:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-07-13 19:38:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-07-13 19:38:05,331 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-07-13 19:38:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,331 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-07-13 19:38:05,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-07-13 19:38:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:38:05,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,332 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:38:05,332 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash -703281478, now seen corresponding path program 4 times [2021-07-13 19:38:05,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967839599] [2021-07-13 19:38:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,365 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 19:38:05,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967839599] [2021-07-13 19:38:05,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967839599] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:38:05,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228509287] [2021-07-13 19:38:05,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:38:05,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:38:05,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:38:05,368 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,401 INFO L93 Difference]: Finished difference Result 63 states and 116 transitions. [2021-07-13 19:38:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:05,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:38:05,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,402 INFO L225 Difference]: With dead ends: 63 [2021-07-13 19:38:05,402 INFO L226 Difference]: Without dead ends: 63 [2021-07-13 19:38:05,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-13 19:38:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-07-13 19:38:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-07-13 19:38:05,406 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-07-13 19:38:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,406 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-07-13 19:38:05,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-07-13 19:38:05,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:38:05,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,407 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:38:05,407 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1830677571, now seen corresponding path program 2 times [2021-07-13 19:38:05,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564628645] [2021-07-13 19:38:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,437 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 19:38:05,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564628645] [2021-07-13 19:38:05,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564628645] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:38:05,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94544582] [2021-07-13 19:38:05,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:38:05,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:38:05,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:38:05,441 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,490 INFO L93 Difference]: Finished difference Result 62 states and 114 transitions. [2021-07-13 19:38:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:38:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,491 INFO L225 Difference]: With dead ends: 62 [2021-07-13 19:38:05,491 INFO L226 Difference]: Without dead ends: 62 [2021-07-13 19:38:05,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-13 19:38:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-07-13 19:38:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-07-13 19:38:05,496 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-07-13 19:38:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,498 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-07-13 19:38:05,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-07-13 19:38:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:38:05,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,502 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:38:05,502 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash 538750782, now seen corresponding path program 5 times [2021-07-13 19:38:05,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325217170] [2021-07-13 19:38:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,548 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 19:38:05,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325217170] [2021-07-13 19:38:05,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325217170] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:38:05,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126918467] [2021-07-13 19:38:05,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:38:05,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:38:05,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:38:05,551 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,612 INFO L93 Difference]: Finished difference Result 65 states and 117 transitions. [2021-07-13 19:38:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:05,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:38:05,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,613 INFO L225 Difference]: With dead ends: 65 [2021-07-13 19:38:05,613 INFO L226 Difference]: Without dead ends: 63 [2021-07-13 19:38:05,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-13 19:38:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-07-13 19:38:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-07-13 19:38:05,626 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 13 [2021-07-13 19:38:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,626 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-07-13 19:38:05,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-07-13 19:38:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:38:05,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,628 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-13 19:38:05,628 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1929059923, now seen corresponding path program 3 times [2021-07-13 19:38:05,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713981960] [2021-07-13 19:38:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,666 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 19:38:05,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713981960] [2021-07-13 19:38:05,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713981960] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:38:05,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638177708] [2021-07-13 19:38:05,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:38:05,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:38:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:38:05,668 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,703 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-07-13 19:38:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:38:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,704 INFO L225 Difference]: With dead ends: 60 [2021-07-13 19:38:05,705 INFO L226 Difference]: Without dead ends: 60 [2021-07-13 19:38:05,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-07-13 19:38:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-07-13 19:38:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-07-13 19:38:05,707 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-07-13 19:38:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,707 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-07-13 19:38:05,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-07-13 19:38:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:38:05,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,708 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:38:05,708 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1614461938, now seen corresponding path program 6 times [2021-07-13 19:38:05,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653230821] [2021-07-13 19:38:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,743 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 19:38:05,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653230821] [2021-07-13 19:38:05,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653230821] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:38:05,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335746576] [2021-07-13 19:38:05,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:38:05,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:38:05,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:38:05,744 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,779 INFO L93 Difference]: Finished difference Result 43 states and 79 transitions. [2021-07-13 19:38:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:38:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,780 INFO L225 Difference]: With dead ends: 43 [2021-07-13 19:38:05,780 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 19:38:05,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 19:38:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-07-13 19:38:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-07-13 19:38:05,782 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-07-13 19:38:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,782 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-07-13 19:38:05,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-07-13 19:38:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:38:05,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,783 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 19:38:05,783 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,784 INFO L82 PathProgramCache]: Analyzing trace with hash 576295941, now seen corresponding path program 1 times [2021-07-13 19:38:05,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143376916] [2021-07-13 19:38:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,916 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 19:38:05,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143376916] [2021-07-13 19:38:05,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143376916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:05,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4464232] [2021-07-13 19:38:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:38:05,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:06,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:06,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:06,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:06,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:06,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:06,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:06,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:06,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:06,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:06,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:06,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:06,234 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:06,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:06,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:06,281 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.6 percent of original size [2021-07-13 19:38:06,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:06,283 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:190, output treesize:43 [2021-07-13 19:38:06,413 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 19:38:06,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4464232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:06,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:06,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:38:06,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330672919] [2021-07-13 19:38:06,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:06,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:06,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:06,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:06,414 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,290 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-07-13 19:38:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:07,329 INFO L93 Difference]: Finished difference Result 88 states and 166 transitions. [2021-07-13 19:38:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:38:07,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:38:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:07,331 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:38:07,331 INFO L226 Difference]: Without dead ends: 67 [2021-07-13 19:38:07,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 953.6ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-13 19:38:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-07-13 19:38:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-07-13 19:38:07,333 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-07-13 19:38:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:07,333 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-07-13 19:38:07,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-07-13 19:38:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:38:07,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:07,334 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:07,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:38:07,535 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:07,535 INFO L82 PathProgramCache]: Analyzing trace with hash -9467753, now seen corresponding path program 2 times [2021-07-13 19:38:07,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:07,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734157046] [2021-07-13 19:38:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:07,668 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 19:38:07,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:07,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734157046] [2021-07-13 19:38:07,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734157046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414415444] [2021-07-13 19:38:07,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:07,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:07,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:07,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:38:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:07,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:07,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:07,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:07,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:07,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:07,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:07,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:07,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:07,922 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:76, output treesize:35 [2021-07-13 19:38:07,998 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 19:38:07,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414415444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:07,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:07,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:38:07,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261298212] [2021-07-13 19:38:07,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:07,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:07,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:07,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:07,999 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:08,263 INFO L93 Difference]: Finished difference Result 60 states and 110 transitions. [2021-07-13 19:38:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:08,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:38:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:08,264 INFO L225 Difference]: With dead ends: 60 [2021-07-13 19:38:08,264 INFO L226 Difference]: Without dead ends: 47 [2021-07-13 19:38:08,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-07-13 19:38:08,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-07-13 19:38:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 88 transitions. [2021-07-13 19:38:08,267 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 88 transitions. Word has length 14 [2021-07-13 19:38:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:08,267 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 88 transitions. [2021-07-13 19:38:08,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 88 transitions. [2021-07-13 19:38:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:38:08,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:08,267 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:08,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:08,492 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash 384988251, now seen corresponding path program 3 times [2021-07-13 19:38:08,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:08,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052909935] [2021-07-13 19:38:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:08,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:08,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052909935] [2021-07-13 19:38:08,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052909935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:08,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939362068] [2021-07-13 19:38:08,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:08,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:08,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:08,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:38:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:08,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:08,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:08,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:08,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:08,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:08,817 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:08,878 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2021-07-13 19:38:08,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:08,880 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:153, output treesize:58 [2021-07-13 19:38:09,022 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 19:38:09,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939362068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:09,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:09,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:38:09,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456397434] [2021-07-13 19:38:09,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:09,024 INFO L87 Difference]: Start difference. First operand 45 states and 88 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:09,333 INFO L93 Difference]: Finished difference Result 73 states and 133 transitions. [2021-07-13 19:38:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:09,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:38:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:09,334 INFO L225 Difference]: With dead ends: 73 [2021-07-13 19:38:09,334 INFO L226 Difference]: Without dead ends: 51 [2021-07-13 19:38:09,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:09,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-07-13 19:38:09,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-07-13 19:38:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-07-13 19:38:09,336 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 14 [2021-07-13 19:38:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:09,336 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-07-13 19:38:09,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-07-13 19:38:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:38:09,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:09,337 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:09,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:38:09,557 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:09,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:09,557 INFO L82 PathProgramCache]: Analyzing trace with hash 922843829, now seen corresponding path program 4 times [2021-07-13 19:38:09,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:09,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637306062] [2021-07-13 19:38:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:09,684 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 19:38:09,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:09,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637306062] [2021-07-13 19:38:09,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637306062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:09,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991012060] [2021-07-13 19:38:09,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:09,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:09,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:09,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:38:09,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:09,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:09,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:09,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:09,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:09,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:09,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:09,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:09,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:09,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:09,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:09,919 INFO L628 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2021-07-13 19:38:09,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:09,921 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-07-13 19:38:10,042 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 19:38:10,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991012060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:10,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:10,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:38:10,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949625566] [2021-07-13 19:38:10,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:10,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:10,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:10,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:10,043 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:10,427 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2021-07-13 19:38:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:10,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:38:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:10,428 INFO L225 Difference]: With dead ends: 81 [2021-07-13 19:38:10,428 INFO L226 Difference]: Without dead ends: 61 [2021-07-13 19:38:10,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 477.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:38:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-07-13 19:38:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2021-07-13 19:38:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 96 transitions. [2021-07-13 19:38:10,430 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 96 transitions. Word has length 14 [2021-07-13 19:38:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:10,431 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 96 transitions. [2021-07-13 19:38:10,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 96 transitions. [2021-07-13 19:38:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:38:10,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:10,431 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:10,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:10,633 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1247641723, now seen corresponding path program 5 times [2021-07-13 19:38:10,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:10,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396442225] [2021-07-13 19:38:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:10,771 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 19:38:10,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396442225] [2021-07-13 19:38:10,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396442225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:10,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607995252] [2021-07-13 19:38:10,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:10,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:10,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:10,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:38:10,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:10,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:10,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:10,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:10,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:10,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:10,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:11,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:11,005 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:33 [2021-07-13 19:38:11,060 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 19:38:11,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607995252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:11,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:11,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:38:11,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513040039] [2021-07-13 19:38:11,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:38:11,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:38:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:11,062 INFO L87 Difference]: Start difference. First operand 49 states and 96 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:11,339 INFO L93 Difference]: Finished difference Result 66 states and 125 transitions. [2021-07-13 19:38:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:11,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:38:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:11,340 INFO L225 Difference]: With dead ends: 66 [2021-07-13 19:38:11,340 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 19:38:11,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:38:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 19:38:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-07-13 19:38:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 104 transitions. [2021-07-13 19:38:11,342 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 104 transitions. Word has length 14 [2021-07-13 19:38:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:11,342 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 104 transitions. [2021-07-13 19:38:11,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 104 transitions. [2021-07-13 19:38:11,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:38:11,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:11,343 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:11,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:11,557 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash -853185719, now seen corresponding path program 6 times [2021-07-13 19:38:11,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:11,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828649636] [2021-07-13 19:38:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:11,685 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 19:38:11,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:11,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828649636] [2021-07-13 19:38:11,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828649636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:11,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215196303] [2021-07-13 19:38:11,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:11,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:11,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:38:11,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:11,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:11,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:11,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:11,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:11,851 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:11,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:11,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:11,905 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-07-13 19:38:11,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:11,907 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:211, output treesize:52 [2021-07-13 19:38:12,044 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 19:38:12,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215196303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:12,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:12,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:38:12,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575921786] [2021-07-13 19:38:12,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:12,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:12,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:12,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:12,046 INFO L87 Difference]: Start difference. First operand 53 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:12,359 INFO L93 Difference]: Finished difference Result 72 states and 139 transitions. [2021-07-13 19:38:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:12,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:38:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:12,359 INFO L225 Difference]: With dead ends: 72 [2021-07-13 19:38:12,359 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:38:12,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:38:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-07-13 19:38:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 104 transitions. [2021-07-13 19:38:12,362 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 104 transitions. Word has length 14 [2021-07-13 19:38:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:12,362 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 104 transitions. [2021-07-13 19:38:12,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 104 transitions. [2021-07-13 19:38:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:38:12,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:12,363 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:12,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 19:38:12,569 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash -315330141, now seen corresponding path program 7 times [2021-07-13 19:38:12,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:12,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251836031] [2021-07-13 19:38:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:12,730 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 19:38:12,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:12,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251836031] [2021-07-13 19:38:12,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251836031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:12,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968368207] [2021-07-13 19:38:12,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:12,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:38:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:12,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:12,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:12,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:12,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:12,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:12,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:12,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:12,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:12,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:12,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:12,977 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-07-13 19:38:12,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:12,979 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:145, output treesize:58 [2021-07-13 19:38:13,105 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 19:38:13,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968368207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:13,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:13,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:38:13,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160531070] [2021-07-13 19:38:13,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:13,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:13,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:13,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:13,107 INFO L87 Difference]: Start difference. First operand 53 states and 104 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:13,509 INFO L93 Difference]: Finished difference Result 120 states and 219 transitions. [2021-07-13 19:38:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:13,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:38:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:13,510 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:38:13,510 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:38:13,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 520.7ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:13,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:38:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 57. [2021-07-13 19:38:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 117 transitions. [2021-07-13 19:38:13,513 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 117 transitions. Word has length 14 [2021-07-13 19:38:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:13,513 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 117 transitions. [2021-07-13 19:38:13,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 117 transitions. [2021-07-13 19:38:13,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:38:13,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:13,514 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:13,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:13,725 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash 272415181, now seen corresponding path program 8 times [2021-07-13 19:38:13,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:13,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539480131] [2021-07-13 19:38:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:13,849 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 19:38:13,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:13,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539480131] [2021-07-13 19:38:13,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539480131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:13,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477067837] [2021-07-13 19:38:13,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:13,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:13,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:38:13,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:13,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:13,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:13,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:13,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:13,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:14,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:14,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:14,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:14,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:14,007 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:14,053 INFO L628 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2021-07-13 19:38:14,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:14,056 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-07-13 19:38:14,153 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 19:38:14,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477067837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:14,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:14,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:38:14,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228352846] [2021-07-13 19:38:14,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:14,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:14,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:14,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:14,155 INFO L87 Difference]: Start difference. First operand 57 states and 117 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:14,446 INFO L93 Difference]: Finished difference Result 100 states and 198 transitions. [2021-07-13 19:38:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:14,447 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:38:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:14,448 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:38:14,449 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:38:14,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:38:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-07-13 19:38:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 126 transitions. [2021-07-13 19:38:14,451 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 126 transitions. Word has length 14 [2021-07-13 19:38:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:14,451 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 126 transitions. [2021-07-13 19:38:14,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 126 transitions. [2021-07-13 19:38:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:14,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:14,471 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:14,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:38:14,683 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:14,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:14,684 INFO L82 PathProgramCache]: Analyzing trace with hash -745410905, now seen corresponding path program 9 times [2021-07-13 19:38:14,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:14,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066632123] [2021-07-13 19:38:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:14,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066632123] [2021-07-13 19:38:14,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066632123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:14,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102075871] [2021-07-13 19:38:14,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:14,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:14,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:14,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102075871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:14,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:14,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:38:14,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704943882] [2021-07-13 19:38:14,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:14,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:14,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:14,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:14,825 INFO L87 Difference]: Start difference. First operand 61 states and 126 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:14,880 INFO L93 Difference]: Finished difference Result 90 states and 180 transitions. [2021-07-13 19:38:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:14,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:14,881 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:38:14,881 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:38:14,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:38:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-07-13 19:38:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-07-13 19:38:14,883 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 15 [2021-07-13 19:38:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:14,883 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-07-13 19:38:14,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-07-13 19:38:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:14,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:14,884 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:15,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 19:38:15,089 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:15,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1331174599, now seen corresponding path program 10 times [2021-07-13 19:38:15,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:15,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056107237] [2021-07-13 19:38:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:15,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:15,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056107237] [2021-07-13 19:38:15,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056107237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:15,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690918986] [2021-07-13 19:38:15,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:15,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:15,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:15,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:15,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:15,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690918986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:15,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:15,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:38:15,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234590815] [2021-07-13 19:38:15,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:15,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:15,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:15,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:15,309 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:15,445 INFO L93 Difference]: Finished difference Result 84 states and 172 transitions. [2021-07-13 19:38:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:15,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:15,446 INFO L225 Difference]: With dead ends: 84 [2021-07-13 19:38:15,446 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:38:15,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:38:15,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-07-13 19:38:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-07-13 19:38:15,449 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 15 [2021-07-13 19:38:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:15,449 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-07-13 19:38:15,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-07-13 19:38:15,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:15,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:15,450 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:15,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:15,657 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:15,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:15,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1920715114, now seen corresponding path program 11 times [2021-07-13 19:38:15,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:15,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802481123] [2021-07-13 19:38:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:15,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:15,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802481123] [2021-07-13 19:38:15,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802481123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:15,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092251689] [2021-07-13 19:38:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:15,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:15,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:15,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:15,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092251689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:15,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:15,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:38:15,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408637523] [2021-07-13 19:38:15,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:38:15,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:15,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:38:15,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:15,871 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:16,105 INFO L93 Difference]: Finished difference Result 107 states and 205 transitions. [2021-07-13 19:38:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:16,111 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:38:16,111 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:38:16,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:38:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2021-07-13 19:38:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-07-13 19:38:16,116 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-07-13 19:38:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:16,117 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-07-13 19:38:16,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-07-13 19:38:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:16,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:16,118 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:16,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 19:38:16,325 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:16,325 INFO L82 PathProgramCache]: Analyzing trace with hash -398863017, now seen corresponding path program 12 times [2021-07-13 19:38:16,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:16,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218869685] [2021-07-13 19:38:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:16,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218869685] [2021-07-13 19:38:16,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218869685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:16,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497987344] [2021-07-13 19:38:16,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:16,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:16,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497987344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:16,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:16,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:16,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744585000] [2021-07-13 19:38:16,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:16,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:16,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:16,513 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:16,647 INFO L93 Difference]: Finished difference Result 98 states and 194 transitions. [2021-07-13 19:38:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:16,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:16,648 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:38:16,648 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:38:16,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:38:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 67. [2021-07-13 19:38:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-07-13 19:38:16,651 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-07-13 19:38:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:16,651 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-07-13 19:38:16,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-07-13 19:38:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:16,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:16,652 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:16,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:16,865 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1526259110, now seen corresponding path program 13 times [2021-07-13 19:38:16,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:16,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529337154] [2021-07-13 19:38:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:16,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529337154] [2021-07-13 19:38:16,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529337154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:16,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942809933] [2021-07-13 19:38:16,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:16,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942809933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:17,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:17,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:38:17,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296950580] [2021-07-13 19:38:17,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:38:17,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:38:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:17,072 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:17,193 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-07-13 19:38:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:17,194 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:17,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:17,194 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:38:17,195 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:38:17,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:38:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-07-13 19:38:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.129032258064516) internal successors, (132), 62 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 132 transitions. [2021-07-13 19:38:17,197 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 132 transitions. Word has length 15 [2021-07-13 19:38:17,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:17,197 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 132 transitions. [2021-07-13 19:38:17,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 132 transitions. [2021-07-13 19:38:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:17,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:17,198 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:17,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:17,421 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:17,421 INFO L82 PathProgramCache]: Analyzing trace with hash 843169243, now seen corresponding path program 14 times [2021-07-13 19:38:17,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:17,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426658212] [2021-07-13 19:38:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:17,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426658212] [2021-07-13 19:38:17,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426658212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:17,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235352873] [2021-07-13 19:38:17,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:17,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:17,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235352873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:17,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:17,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:17,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283348969] [2021-07-13 19:38:17,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:17,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:17,565 INFO L87 Difference]: Start difference. First operand 63 states and 132 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:17,643 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2021-07-13 19:38:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:17,644 INFO L225 Difference]: With dead ends: 75 [2021-07-13 19:38:17,644 INFO L226 Difference]: Without dead ends: 73 [2021-07-13 19:38:17,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:17,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-07-13 19:38:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-07-13 19:38:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-07-13 19:38:17,646 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 15 [2021-07-13 19:38:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:17,646 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-07-13 19:38:17,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-07-13 19:38:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:17,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:17,647 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:17,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 19:38:17,862 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1281477977, now seen corresponding path program 15 times [2021-07-13 19:38:17,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:17,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135377725] [2021-07-13 19:38:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:17,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135377725] [2021-07-13 19:38:17,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135377725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:17,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120156320] [2021-07-13 19:38:17,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:17,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:17,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:17,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:18,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120156320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:18,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:18,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:38:18,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970085219] [2021-07-13 19:38:18,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:18,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:18,062 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:18,187 INFO L93 Difference]: Finished difference Result 74 states and 153 transitions. [2021-07-13 19:38:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:18,188 INFO L225 Difference]: With dead ends: 74 [2021-07-13 19:38:18,188 INFO L226 Difference]: Without dead ends: 74 [2021-07-13 19:38:18,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-13 19:38:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2021-07-13 19:38:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-07-13 19:38:18,190 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 15 [2021-07-13 19:38:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:18,191 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-07-13 19:38:18,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-07-13 19:38:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:18,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:18,191 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:18,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:18,405 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:18,405 INFO L82 PathProgramCache]: Analyzing trace with hash -349166395, now seen corresponding path program 16 times [2021-07-13 19:38:18,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:18,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800854340] [2021-07-13 19:38:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:18,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:18,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800854340] [2021-07-13 19:38:18,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800854340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:18,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430329305] [2021-07-13 19:38:18,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:18,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:18,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:18,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:18,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:18,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430329305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:18,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:18,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:18,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899760853] [2021-07-13 19:38:18,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:18,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:18,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:18,567 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:18,617 INFO L93 Difference]: Finished difference Result 82 states and 169 transitions. [2021-07-13 19:38:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:18,618 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:38:18,618 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:38:18,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:38:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2021-07-13 19:38:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 127 transitions. [2021-07-13 19:38:18,621 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 127 transitions. Word has length 15 [2021-07-13 19:38:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:18,621 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 127 transitions. [2021-07-13 19:38:18,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 127 transitions. [2021-07-13 19:38:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:18,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:18,621 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:18,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-07-13 19:38:18,833 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash -855512661, now seen corresponding path program 17 times [2021-07-13 19:38:18,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:18,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455565971] [2021-07-13 19:38:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:18,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:18,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455565971] [2021-07-13 19:38:18,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455565971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:18,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740163333] [2021-07-13 19:38:18,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:18,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:38:18,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:18,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:18,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740163333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:19,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:19,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:19,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627638093] [2021-07-13 19:38:19,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:19,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:19,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:19,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:19,014 INFO L87 Difference]: Start difference. First operand 61 states and 127 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:19,063 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-07-13 19:38:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:19,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:19,065 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:38:19,065 INFO L226 Difference]: Without dead ends: 85 [2021-07-13 19:38:19,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-13 19:38:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2021-07-13 19:38:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 62 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 133 transitions. [2021-07-13 19:38:19,070 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 133 transitions. Word has length 15 [2021-07-13 19:38:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:19,070 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 133 transitions. [2021-07-13 19:38:19,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 133 transitions. [2021-07-13 19:38:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:19,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:19,070 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:19,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:19,277 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash 386519599, now seen corresponding path program 18 times [2021-07-13 19:38:19,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:19,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749538929] [2021-07-13 19:38:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:19,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749538929] [2021-07-13 19:38:19,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749538929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:19,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776869217] [2021-07-13 19:38:19,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:19,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:19,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:19,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776869217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:19,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:19,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:19,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768109025] [2021-07-13 19:38:19,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:19,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:19,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:19,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:19,423 INFO L87 Difference]: Start difference. First operand 63 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:19,466 INFO L93 Difference]: Finished difference Result 87 states and 169 transitions. [2021-07-13 19:38:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:19,466 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:19,467 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:38:19,467 INFO L226 Difference]: Without dead ends: 85 [2021-07-13 19:38:19,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-13 19:38:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2021-07-13 19:38:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-07-13 19:38:19,470 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-07-13 19:38:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:19,470 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-07-13 19:38:19,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-07-13 19:38:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:19,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:19,471 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:19,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-07-13 19:38:19,685 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1759651161, now seen corresponding path program 19 times [2021-07-13 19:38:19,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:19,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081059857] [2021-07-13 19:38:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:19,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081059857] [2021-07-13 19:38:19,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081059857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:19,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930651766] [2021-07-13 19:38:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:38:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:19,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930651766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:19,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:19,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:19,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41168792] [2021-07-13 19:38:19,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:19,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:19,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:19,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:19,852 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:19,934 INFO L93 Difference]: Finished difference Result 69 states and 140 transitions. [2021-07-13 19:38:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:19,934 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:19,935 INFO L225 Difference]: With dead ends: 69 [2021-07-13 19:38:19,935 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:38:19,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:38:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-07-13 19:38:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-07-13 19:38:19,937 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 15 [2021-07-13 19:38:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:19,937 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-07-13 19:38:19,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-07-13 19:38:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:19,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:19,938 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:20,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 19:38:20,161 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash -942940134, now seen corresponding path program 20 times [2021-07-13 19:38:20,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:20,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660227822] [2021-07-13 19:38:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660227822] [2021-07-13 19:38:20,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660227822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300616866] [2021-07-13 19:38:20,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:20,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:20,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:20,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300616866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:20,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:20,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:38:20,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135386380] [2021-07-13 19:38:20,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:20,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:20,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:20,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:20,324 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:20,377 INFO L93 Difference]: Finished difference Result 72 states and 144 transitions. [2021-07-13 19:38:20,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:20,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:20,378 INFO L225 Difference]: With dead ends: 72 [2021-07-13 19:38:20,378 INFO L226 Difference]: Without dead ends: 66 [2021-07-13 19:38:20,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-13 19:38:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-07-13 19:38:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 128 transitions. [2021-07-13 19:38:20,380 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 128 transitions. Word has length 15 [2021-07-13 19:38:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:20,381 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 128 transitions. [2021-07-13 19:38:20,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 128 transitions. [2021-07-13 19:38:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:20,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:20,381 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:20,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:20,604 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1010165383, now seen corresponding path program 21 times [2021-07-13 19:38:20,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:20,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727940324] [2021-07-13 19:38:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:20,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727940324] [2021-07-13 19:38:20,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727940324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:20,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931003152] [2021-07-13 19:38:20,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:20,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:20,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:20,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931003152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:20,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:20,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:38:20,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555643023] [2021-07-13 19:38:20,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:20,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:20,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:20,753 INFO L87 Difference]: Start difference. First operand 62 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:20,831 INFO L93 Difference]: Finished difference Result 70 states and 144 transitions. [2021-07-13 19:38:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:20,832 INFO L225 Difference]: With dead ends: 70 [2021-07-13 19:38:20,832 INFO L226 Difference]: Without dead ends: 70 [2021-07-13 19:38:20,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-07-13 19:38:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-07-13 19:38:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 128 transitions. [2021-07-13 19:38:20,834 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 128 transitions. Word has length 15 [2021-07-13 19:38:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:20,834 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 128 transitions. [2021-07-13 19:38:20,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,834 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 128 transitions. [2021-07-13 19:38:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:20,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:20,835 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:21,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:21,049 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705898, now seen corresponding path program 22 times [2021-07-13 19:38:21,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:21,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944021827] [2021-07-13 19:38:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:21,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944021827] [2021-07-13 19:38:21,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944021827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961371052] [2021-07-13 19:38:21,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:38:21,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:21,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:21,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:21,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961371052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:21,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:21,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377690946] [2021-07-13 19:38:21,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:21,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:21,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:21,218 INFO L87 Difference]: Start difference. First operand 62 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:21,265 INFO L93 Difference]: Finished difference Result 83 states and 161 transitions. [2021-07-13 19:38:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:21,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:21,266 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:38:21,266 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:38:21,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:38:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2021-07-13 19:38:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.121212121212121) internal successors, (140), 66 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 140 transitions. [2021-07-13 19:38:21,268 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 140 transitions. Word has length 15 [2021-07-13 19:38:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:21,268 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 140 transitions. [2021-07-13 19:38:21,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 140 transitions. [2021-07-13 19:38:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:21,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:21,269 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:21,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:21,477 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash -77853801, now seen corresponding path program 23 times [2021-07-13 19:38:21,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:21,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830995930] [2021-07-13 19:38:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:21,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830995930] [2021-07-13 19:38:21,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830995930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193916734] [2021-07-13 19:38:21,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:21,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:21,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193916734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:21,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:38:21,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493938119] [2021-07-13 19:38:21,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:21,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:21,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:21,632 INFO L87 Difference]: Start difference. First operand 67 states and 140 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:21,703 INFO L93 Difference]: Finished difference Result 96 states and 190 transitions. [2021-07-13 19:38:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:21,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:21,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:21,704 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:38:21,704 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:38:21,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:38:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 67. [2021-07-13 19:38:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.121212121212121) internal successors, (140), 66 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 140 transitions. [2021-07-13 19:38:21,706 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 140 transitions. Word has length 15 [2021-07-13 19:38:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:21,707 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 140 transitions. [2021-07-13 19:38:21,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,707 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 140 transitions. [2021-07-13 19:38:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:21,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:21,708 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:21,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:21,921 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1205249894, now seen corresponding path program 24 times [2021-07-13 19:38:21,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:21,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136677281] [2021-07-13 19:38:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:21,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136677281] [2021-07-13 19:38:21,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136677281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257830984] [2021-07-13 19:38:21,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:38:22,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:22,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257830984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:22,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:22,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:22,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244966368] [2021-07-13 19:38:22,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:22,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:22,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:22,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:22,087 INFO L87 Difference]: Start difference. First operand 67 states and 140 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:22,137 INFO L93 Difference]: Finished difference Result 68 states and 140 transitions. [2021-07-13 19:38:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:22,138 INFO L225 Difference]: With dead ends: 68 [2021-07-13 19:38:22,138 INFO L226 Difference]: Without dead ends: 68 [2021-07-13 19:38:22,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-13 19:38:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-07-13 19:38:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-07-13 19:38:22,140 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 15 [2021-07-13 19:38:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:22,140 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-07-13 19:38:22,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-07-13 19:38:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:22,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:22,141 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:22,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 19:38:22,357 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:22,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1164178459, now seen corresponding path program 25 times [2021-07-13 19:38:22,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:22,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690950764] [2021-07-13 19:38:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:22,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690950764] [2021-07-13 19:38:22,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690950764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:22,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100986673] [2021-07-13 19:38:22,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:22,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:22,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100986673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:22,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:22,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:22,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696356475] [2021-07-13 19:38:22,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:22,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:22,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:22,493 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:22,540 INFO L93 Difference]: Finished difference Result 73 states and 148 transitions. [2021-07-13 19:38:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:22,541 INFO L225 Difference]: With dead ends: 73 [2021-07-13 19:38:22,541 INFO L226 Difference]: Without dead ends: 71 [2021-07-13 19:38:22,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-07-13 19:38:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2021-07-13 19:38:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 126 transitions. [2021-07-13 19:38:22,543 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 126 transitions. Word has length 15 [2021-07-13 19:38:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:22,543 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 126 transitions. [2021-07-13 19:38:22,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 126 transitions. [2021-07-13 19:38:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:22,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:22,544 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:22,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:22,765 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1973989497, now seen corresponding path program 26 times [2021-07-13 19:38:22,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:22,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999424265] [2021-07-13 19:38:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:22,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999424265] [2021-07-13 19:38:22,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999424265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:22,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898805901] [2021-07-13 19:38:22,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:22,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:22,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898805901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:22,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:22,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:22,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043795784] [2021-07-13 19:38:22,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:22,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:22,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:22,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:22,926 INFO L87 Difference]: Start difference. First operand 61 states and 126 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:22,969 INFO L93 Difference]: Finished difference Result 83 states and 158 transitions. [2021-07-13 19:38:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:22,970 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:38:22,971 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:38:22,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:38:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2021-07-13 19:38:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-07-13 19:38:22,973 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-07-13 19:38:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:22,973 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-07-13 19:38:22,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-07-13 19:38:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:22,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:22,973 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:23,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-13 19:38:23,189 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1711596160, now seen corresponding path program 27 times [2021-07-13 19:38:23,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:23,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741451962] [2021-07-13 19:38:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:23,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:23,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741451962] [2021-07-13 19:38:23,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741451962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298076384] [2021-07-13 19:38:23,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:23,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:38:23,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:23,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:23,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:23,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298076384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:23,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:23,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811288486] [2021-07-13 19:38:23,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:23,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:23,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:23,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:23,337 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:23,432 INFO L93 Difference]: Finished difference Result 96 states and 181 transitions. [2021-07-13 19:38:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:23,432 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:23,432 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:38:23,432 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:38:23,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:38:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2021-07-13 19:38:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2021-07-13 19:38:23,435 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2021-07-13 19:38:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:23,435 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2021-07-13 19:38:23,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2021-07-13 19:38:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:23,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:23,436 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:23,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-13 19:38:23,645 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:23,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1173740582, now seen corresponding path program 28 times [2021-07-13 19:38:23,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:23,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225449690] [2021-07-13 19:38:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:23,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:23,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225449690] [2021-07-13 19:38:23,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225449690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519490821] [2021-07-13 19:38:23,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:23,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:23,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:23,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519490821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:23,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:38:23,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283844901] [2021-07-13 19:38:23,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:23,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:23,814 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:23,856 INFO L93 Difference]: Finished difference Result 69 states and 137 transitions. [2021-07-13 19:38:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:23,857 INFO L225 Difference]: With dead ends: 69 [2021-07-13 19:38:23,857 INFO L226 Difference]: Without dead ends: 69 [2021-07-13 19:38:23,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-13 19:38:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-07-13 19:38:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-07-13 19:38:23,861 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-07-13 19:38:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:23,861 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-07-13 19:38:23,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-07-13 19:38:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:23,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:23,862 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:24,077 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1488338567, now seen corresponding path program 29 times [2021-07-13 19:38:24,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075249307] [2021-07-13 19:38:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:24,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075249307] [2021-07-13 19:38:24,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075249307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:24,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693431305] [2021-07-13 19:38:24,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:24,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:24,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:24,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693431305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:24,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:24,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:24,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575174594] [2021-07-13 19:38:24,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:24,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:24,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:24,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:24,241 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:24,318 INFO L93 Difference]: Finished difference Result 62 states and 120 transitions. [2021-07-13 19:38:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:24,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:24,319 INFO L225 Difference]: With dead ends: 62 [2021-07-13 19:38:24,319 INFO L226 Difference]: Without dead ends: 58 [2021-07-13 19:38:24,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-13 19:38:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-07-13 19:38:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-07-13 19:38:24,321 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-07-13 19:38:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:24,321 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-07-13 19:38:24,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-07-13 19:38:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:24,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:24,322 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 19:38:24,529 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1065816366, now seen corresponding path program 30 times [2021-07-13 19:38:24,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950315364] [2021-07-13 19:38:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:24,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950315364] [2021-07-13 19:38:24,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950315364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:24,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943071272] [2021-07-13 19:38:24,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:24,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:24,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:24,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943071272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:24,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:24,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:24,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154949216] [2021-07-13 19:38:24,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:24,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:24,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:24,685 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:24,773 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-07-13 19:38:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:24,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:24,773 INFO L225 Difference]: With dead ends: 81 [2021-07-13 19:38:24,773 INFO L226 Difference]: Without dead ends: 78 [2021-07-13 19:38:24,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-13 19:38:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2021-07-13 19:38:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-07-13 19:38:24,775 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-07-13 19:38:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:24,776 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-07-13 19:38:24,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-07-13 19:38:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:24,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:24,776 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-07-13 19:38:24,985 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash 456035731, now seen corresponding path program 31 times [2021-07-13 19:38:24,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623480447] [2021-07-13 19:38:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:25,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623480447] [2021-07-13 19:38:25,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623480447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:25,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811231302] [2021-07-13 19:38:25,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811231302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:25,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:25,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:38:25,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045225298] [2021-07-13 19:38:25,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:38:25,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:25,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:38:25,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:25,194 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:25,292 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-07-13 19:38:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:25,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:25,294 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:38:25,294 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:38:25,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:38:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-07-13 19:38:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-07-13 19:38:25,297 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-07-13 19:38:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:25,298 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-07-13 19:38:25,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-07-13 19:38:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:25,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:25,299 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:25,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-13 19:38:25,513 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash -671360362, now seen corresponding path program 32 times [2021-07-13 19:38:25,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:25,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924586842] [2021-07-13 19:38:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:25,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924586842] [2021-07-13 19:38:25,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924586842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:25,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917590557] [2021-07-13 19:38:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:25,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:25,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:25,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917590557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:25,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:25,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:25,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628943743] [2021-07-13 19:38:25,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:25,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:25,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:25,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:25,660 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:25,743 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2021-07-13 19:38:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:25,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:25,744 INFO L225 Difference]: With dead ends: 81 [2021-07-13 19:38:25,744 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:38:25,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:38:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2021-07-13 19:38:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-07-13 19:38:25,746 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-07-13 19:38:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:25,746 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-07-13 19:38:25,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-07-13 19:38:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:25,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:25,747 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:25,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:25,967 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1698067991, now seen corresponding path program 33 times [2021-07-13 19:38:25,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:25,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351773182] [2021-07-13 19:38:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351773182] [2021-07-13 19:38:26,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351773182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842959468] [2021-07-13 19:38:26,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:26,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:26,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:26,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:26,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842959468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:26,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:38:26,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593792113] [2021-07-13 19:38:26,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:38:26,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:26,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:38:26,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:26,137 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:26,303 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-07-13 19:38:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:26,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:26,304 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:38:26,304 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:38:26,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:38:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-07-13 19:38:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-07-13 19:38:26,306 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-07-13 19:38:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:26,306 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-07-13 19:38:26,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-07-13 19:38:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:26,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:26,307 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:26,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 19:38:26,521 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:26,521 INFO L82 PathProgramCache]: Analyzing trace with hash -133504784, now seen corresponding path program 34 times [2021-07-13 19:38:26,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:26,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816951712] [2021-07-13 19:38:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:26,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816951712] [2021-07-13 19:38:26,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816951712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479717712] [2021-07-13 19:38:26,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:26,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:26,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:26,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479717712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:26,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:38:26,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821325469] [2021-07-13 19:38:26,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:26,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:26,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:26,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:26,635 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:26,714 INFO L93 Difference]: Finished difference Result 73 states and 143 transitions. [2021-07-13 19:38:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:26,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:26,715 INFO L225 Difference]: With dead ends: 73 [2021-07-13 19:38:26,715 INFO L226 Difference]: Without dead ends: 73 [2021-07-13 19:38:26,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-07-13 19:38:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-07-13 19:38:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-07-13 19:38:26,716 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-07-13 19:38:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:26,716 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-07-13 19:38:26,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-07-13 19:38:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:26,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:26,717 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:26,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:26,917 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash -448102769, now seen corresponding path program 35 times [2021-07-13 19:38:26,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:26,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235693828] [2021-07-13 19:38:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:26,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235693828] [2021-07-13 19:38:26,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235693828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795809941] [2021-07-13 19:38:26,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:38:27,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:27,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:27,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795809941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:27,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:38:27,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660502292] [2021-07-13 19:38:27,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:38:27,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:27,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:38:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:27,094 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:27,194 INFO L93 Difference]: Finished difference Result 79 states and 144 transitions. [2021-07-13 19:38:27,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:27,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:27,195 INFO L225 Difference]: With dead ends: 79 [2021-07-13 19:38:27,195 INFO L226 Difference]: Without dead ends: 75 [2021-07-13 19:38:27,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-13 19:38:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-07-13 19:38:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-07-13 19:38:27,196 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-07-13 19:38:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:27,197 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-07-13 19:38:27,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-07-13 19:38:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:27,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:27,197 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:27,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-13 19:38:27,405 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:27,406 INFO L82 PathProgramCache]: Analyzing trace with hash 454240538, now seen corresponding path program 36 times [2021-07-13 19:38:27,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:27,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166303578] [2021-07-13 19:38:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:27,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166303578] [2021-07-13 19:38:27,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166303578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159389998] [2021-07-13 19:38:27,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:27,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:27,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:27,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:27,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159389998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:27,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:38:27,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527162713] [2021-07-13 19:38:27,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:27,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:27,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:27,529 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:27,584 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-07-13 19:38:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:27,585 INFO L225 Difference]: With dead ends: 81 [2021-07-13 19:38:27,585 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:38:27,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:38:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-07-13 19:38:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-07-13 19:38:27,587 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-07-13 19:38:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:27,587 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-07-13 19:38:27,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-07-13 19:38:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:38:27,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:27,588 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:27,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:27,797 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1460795301, now seen corresponding path program 37 times [2021-07-13 19:38:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:27,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586585290] [2021-07-13 19:38:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:27,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586585290] [2021-07-13 19:38:27,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586585290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51812863] [2021-07-13 19:38:27,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:38:27,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51812863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:27,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:27,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326710992] [2021-07-13 19:38:27,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:27,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:27,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:27,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:27,958 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:28,085 INFO L93 Difference]: Finished difference Result 58 states and 108 transitions. [2021-07-13 19:38:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:38:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:28,086 INFO L225 Difference]: With dead ends: 58 [2021-07-13 19:38:28,086 INFO L226 Difference]: Without dead ends: 52 [2021-07-13 19:38:28,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-13 19:38:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-07-13 19:38:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-07-13 19:38:28,088 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-07-13 19:38:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:28,088 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-07-13 19:38:28,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-07-13 19:38:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:28,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:28,089 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:28,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-13 19:38:28,301 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:28,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1741313336, now seen corresponding path program 38 times [2021-07-13 19:38:28,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:28,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342268148] [2021-07-13 19:38:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:28,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342268148] [2021-07-13 19:38:28,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342268148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:28,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621949826] [2021-07-13 19:38:28,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:38:28,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:28,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:28,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:28,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:28,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:28,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:28,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:28,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:28,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:28,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:28,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:28,699 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:76, output treesize:35 [2021-07-13 19:38:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621949826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:28,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:28,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:38:28,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368877608] [2021-07-13 19:38:28,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:28,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:28,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:28,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:28,762 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:29,186 INFO L93 Difference]: Finished difference Result 103 states and 190 transitions. [2021-07-13 19:38:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:38:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:29,187 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:38:29,187 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:38:29,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 546.2ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:38:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-07-13 19:38:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 104 transitions. [2021-07-13 19:38:29,189 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 104 transitions. Word has length 16 [2021-07-13 19:38:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:29,189 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 104 transitions. [2021-07-13 19:38:29,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 104 transitions. [2021-07-13 19:38:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:29,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:29,189 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:29,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:29,405 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash 712811384, now seen corresponding path program 39 times [2021-07-13 19:38:29,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:29,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10633352] [2021-07-13 19:38:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:29,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10633352] [2021-07-13 19:38:29,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10633352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892329873] [2021-07-13 19:38:29,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:29,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:29,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:29,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:30,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:30,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:38:30,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:30,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:30,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:38:30,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,390 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-07-13 19:38:30,390 INFO L628 ElimStorePlain]: treesize reduction 232, result has 31.4 percent of original size [2021-07-13 19:38:30,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:30,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:30,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:30,439 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:30,443 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:30,510 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.8 percent of original size [2021-07-13 19:38:30,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:38:30,514 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:464, output treesize:59 [2021-07-13 19:38:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:30,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892329873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:30,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:30,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:38:30,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822748788] [2021-07-13 19:38:30,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:30,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:30,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:30,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:30,598 INFO L87 Difference]: Start difference. First operand 54 states and 104 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:31,547 INFO L93 Difference]: Finished difference Result 102 states and 198 transitions. [2021-07-13 19:38:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:38:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:31,548 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:38:31,548 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:38:31,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1087.5ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:38:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2021-07-13 19:38:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-07-13 19:38:31,550 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 16 [2021-07-13 19:38:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:31,550 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-07-13 19:38:31,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-07-13 19:38:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:31,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:31,551 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:31,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-13 19:38:31,773 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash 762508006, now seen corresponding path program 40 times [2021-07-13 19:38:31,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:31,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185923786] [2021-07-13 19:38:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:31,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:31,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185923786] [2021-07-13 19:38:31,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185923786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:31,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080480231] [2021-07-13 19:38:31,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:31,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:31,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:31,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:31,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:32,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:32,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:32,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:32,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:32,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:32,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:32,271 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:35 [2021-07-13 19:38:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:32,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080480231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:32,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:32,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:38:32,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312447095] [2021-07-13 19:38:32,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:32,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:32,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:32,329 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:32,507 INFO L93 Difference]: Finished difference Result 80 states and 150 transitions. [2021-07-13 19:38:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:32,508 INFO L225 Difference]: With dead ends: 80 [2021-07-13 19:38:32,508 INFO L226 Difference]: Without dead ends: 64 [2021-07-13 19:38:32,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-13 19:38:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-07-13 19:38:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 61 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 123 transitions. [2021-07-13 19:38:32,510 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 123 transitions. Word has length 16 [2021-07-13 19:38:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:32,510 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 123 transitions. [2021-07-13 19:38:32,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 123 transitions. [2021-07-13 19:38:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:32,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:32,511 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:32,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:32,713 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:32,713 INFO L82 PathProgramCache]: Analyzing trace with hash 105742242, now seen corresponding path program 41 times [2021-07-13 19:38:32,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:32,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831806416] [2021-07-13 19:38:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:32,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831806416] [2021-07-13 19:38:32,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831806416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822226875] [2021-07-13 19:38:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:33,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:33,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:33,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:33,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:33,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:33,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:33,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:33,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:33,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:33,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:33,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:33,220 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:33,253 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:38:33,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:33,254 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:131, output treesize:43 [2021-07-13 19:38:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:33,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822226875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:33,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:33,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:33,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570100463] [2021-07-13 19:38:33,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:33,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:33,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:33,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:33,314 INFO L87 Difference]: Start difference. First operand 62 states and 123 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:33,776 INFO L93 Difference]: Finished difference Result 81 states and 159 transitions. [2021-07-13 19:38:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:38:33,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:33,777 INFO L225 Difference]: With dead ends: 81 [2021-07-13 19:38:33,777 INFO L226 Difference]: Without dead ends: 74 [2021-07-13 19:38:33,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 659.2ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:38:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-13 19:38:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2021-07-13 19:38:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-07-13 19:38:33,779 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 16 [2021-07-13 19:38:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:33,779 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-07-13 19:38:33,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-07-13 19:38:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:33,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:33,779 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:33,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:33,980 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:33,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:33,980 INFO L82 PathProgramCache]: Analyzing trace with hash 500198246, now seen corresponding path program 42 times [2021-07-13 19:38:33,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:33,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076628528] [2021-07-13 19:38:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:34,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076628528] [2021-07-13 19:38:34,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076628528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:34,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292342485] [2021-07-13 19:38:34,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:34,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:34,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:34,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:34,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:34,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:34,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:34,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:34,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:34,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:34,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:34,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:34,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:34,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:34,450 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:34,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:34,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:34,476 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:147, output treesize:58 [2021-07-13 19:38:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292342485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:34,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:34,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:38:34,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007739335] [2021-07-13 19:38:34,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:38:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:34,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:38:34,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:38:34,598 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:35,044 INFO L93 Difference]: Finished difference Result 110 states and 202 transitions. [2021-07-13 19:38:35,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:35,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:35,045 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:38:35,045 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:38:35,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 650.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:38:35,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-07-13 19:38:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 132 transitions. [2021-07-13 19:38:35,047 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 132 transitions. Word has length 16 [2021-07-13 19:38:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:35,047 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 132 transitions. [2021-07-13 19:38:35,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 132 transitions. [2021-07-13 19:38:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:35,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:35,047 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:35,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-07-13 19:38:35,261 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash -400604024, now seen corresponding path program 43 times [2021-07-13 19:38:35,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:35,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913008204] [2021-07-13 19:38:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:35,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:35,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913008204] [2021-07-13 19:38:35,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913008204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:35,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245343948] [2021-07-13 19:38:35,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:35,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:35,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:35,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:35,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:35,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:35,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:35,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:35,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:35,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:35,723 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:35,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:35,727 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:35,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:35,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:35,734 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:35,776 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-07-13 19:38:35,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:35,777 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:220, output treesize:43 [2021-07-13 19:38:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:35,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245343948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:35,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:35,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:35,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474962472] [2021-07-13 19:38:35,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:35,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:35,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:35,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:35,836 INFO L87 Difference]: Start difference. First operand 65 states and 132 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:36,354 INFO L93 Difference]: Finished difference Result 98 states and 191 transitions. [2021-07-13 19:38:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:38:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:36,354 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:38:36,354 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:38:36,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 698.6ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:38:36,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:38:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 67. [2021-07-13 19:38:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 137 transitions. [2021-07-13 19:38:36,356 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 137 transitions. Word has length 16 [2021-07-13 19:38:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:36,356 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 137 transitions. [2021-07-13 19:38:36,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 137 transitions. [2021-07-13 19:38:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:36,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:36,357 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-07-13 19:38:36,561 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,561 INFO L82 PathProgramCache]: Analyzing trace with hash -6148020, now seen corresponding path program 44 times [2021-07-13 19:38:36,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101442787] [2021-07-13 19:38:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101442787] [2021-07-13 19:38:36,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101442787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:36,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205802645] [2021-07-13 19:38:36,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:36,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:36,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:36,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:36,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:36,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:36,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:36,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:36,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:36,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:36,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:36,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:36,966 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:36,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:36,969 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:36,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:36,973 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:37,021 INFO L628 ElimStorePlain]: treesize reduction 43, result has 54.7 percent of original size [2021-07-13 19:38:37,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:37,022 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:211, output treesize:52 [2021-07-13 19:38:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205802645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:37,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:37,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:37,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738441188] [2021-07-13 19:38:37,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:37,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:37,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:37,125 INFO L87 Difference]: Start difference. First operand 67 states and 137 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:37,474 INFO L93 Difference]: Finished difference Result 88 states and 175 transitions. [2021-07-13 19:38:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:37,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:37,475 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:38:37,475 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:38:37,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:38:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:38:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2021-07-13 19:38:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 65 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 134 transitions. [2021-07-13 19:38:37,477 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 134 transitions. Word has length 16 [2021-07-13 19:38:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:37,477 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 134 transitions. [2021-07-13 19:38:37,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 134 transitions. [2021-07-13 19:38:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:37,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:37,478 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:37,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-07-13 19:38:37,701 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:37,701 INFO L82 PathProgramCache]: Analyzing trace with hash 531707558, now seen corresponding path program 45 times [2021-07-13 19:38:37,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:37,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639921823] [2021-07-13 19:38:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:37,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639921823] [2021-07-13 19:38:37,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639921823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:37,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395261582] [2021-07-13 19:38:37,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:37,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:38:37,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:38,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:38,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:38,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:38,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:38,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:38,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:38,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:38,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:38,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:38,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:38,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:115, output treesize:58 [2021-07-13 19:38:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395261582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:38,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:38,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:38,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113529748] [2021-07-13 19:38:38,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:38,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:38,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:38,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:38,243 INFO L87 Difference]: Start difference. First operand 66 states and 134 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:38,762 INFO L93 Difference]: Finished difference Result 113 states and 217 transitions. [2021-07-13 19:38:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:38:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:38,762 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:38:38,762 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:38:38,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 680.4ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:38:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-07-13 19:38:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 139 transitions. [2021-07-13 19:38:38,764 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 139 transitions. Word has length 16 [2021-07-13 19:38:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:38,764 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 139 transitions. [2021-07-13 19:38:38,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 139 transitions. [2021-07-13 19:38:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:38,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:38,765 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:38,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:38,981 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1991864008, now seen corresponding path program 46 times [2021-07-13 19:38:38,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:38,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998940751] [2021-07-13 19:38:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:39,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:39,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998940751] [2021-07-13 19:38:39,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998940751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:39,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615899742] [2021-07-13 19:38:39,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:39,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:39,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:39,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:39,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:39,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:39,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:39,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:39,471 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:35 [2021-07-13 19:38:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:39,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615899742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:39,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:39,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:38:39,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216247452] [2021-07-13 19:38:39,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:38:39,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:39,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:38:39,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:39,527 INFO L87 Difference]: Start difference. First operand 68 states and 139 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:39,688 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-07-13 19:38:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:39,689 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:39,689 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:38:39,689 INFO L226 Difference]: Without dead ends: 73 [2021-07-13 19:38:39,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-07-13 19:38:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-07-13 19:38:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 70 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 145 transitions. [2021-07-13 19:38:39,691 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 145 transitions. Word has length 16 [2021-07-13 19:38:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:39,691 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 145 transitions. [2021-07-13 19:38:39,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 145 transitions. [2021-07-13 19:38:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:39,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:39,692 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:39,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:39,901 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:39,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:39,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1646337524, now seen corresponding path program 47 times [2021-07-13 19:38:39,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:39,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112151081] [2021-07-13 19:38:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:40,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112151081] [2021-07-13 19:38:40,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112151081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:40,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225663612] [2021-07-13 19:38:40,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:40,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:40,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:40,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:40,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:40,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:40,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:40,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:40,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:40,307 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:40,310 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:40,313 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:40,349 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-07-13 19:38:40,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:40,350 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:190, output treesize:43 [2021-07-13 19:38:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225663612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:40,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:40,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:38:40,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787625815] [2021-07-13 19:38:40,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:40,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:40,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:40,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:40,406 INFO L87 Difference]: Start difference. First operand 71 states and 145 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:40,830 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-07-13 19:38:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:38:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:40,830 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:38:40,830 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:38:40,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 556.5ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:38:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-07-13 19:38:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-07-13 19:38:40,832 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-07-13 19:38:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:40,832 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-07-13 19:38:40,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-07-13 19:38:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:40,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:40,833 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:41,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-07-13 19:38:41,045 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:41,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2040793528, now seen corresponding path program 48 times [2021-07-13 19:38:41,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:41,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773117857] [2021-07-13 19:38:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773117857] [2021-07-13 19:38:41,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773117857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884621887] [2021-07-13 19:38:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:41,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:41,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:41,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:41,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:41,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:41,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:41,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:41,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:41,400 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:41,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:41,407 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:41,455 INFO L628 ElimStorePlain]: treesize reduction 43, result has 54.7 percent of original size [2021-07-13 19:38:41,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:41,456 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:211, output treesize:52 [2021-07-13 19:38:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884621887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:41,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:41,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:38:41,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320517209] [2021-07-13 19:38:41,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:38:41,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:41,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:38:41,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:38:41,576 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:42,008 INFO L93 Difference]: Finished difference Result 97 states and 194 transitions. [2021-07-13 19:38:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:38:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:42,009 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:38:42,009 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:38:42,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 570.1ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:38:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2021-07-13 19:38:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 70 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 145 transitions. [2021-07-13 19:38:42,013 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 145 transitions. Word has length 16 [2021-07-13 19:38:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:42,014 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 145 transitions. [2021-07-13 19:38:42,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 145 transitions. [2021-07-13 19:38:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:42,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:42,014 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:42,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:42,214 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1139991258, now seen corresponding path program 49 times [2021-07-13 19:38:42,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:42,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410429909] [2021-07-13 19:38:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:42,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410429909] [2021-07-13 19:38:42,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410429909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:42,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169283457] [2021-07-13 19:38:42,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:42,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:42,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:42,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:42,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:42,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:42,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:42,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:42,697 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:42,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:42,751 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:38:42,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:42,752 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:156, output treesize:43 [2021-07-13 19:38:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169283457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:42,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:42,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:38:42,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573177218] [2021-07-13 19:38:42,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:42,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:42,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:42,813 INFO L87 Difference]: Start difference. First operand 71 states and 145 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:43,188 INFO L93 Difference]: Finished difference Result 91 states and 183 transitions. [2021-07-13 19:38:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:38:43,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:43,189 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:38:43,189 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:38:43,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 566.3ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:38:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-07-13 19:38:43,190 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 19:38:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-07-13 19:38:43,191 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 16 [2021-07-13 19:38:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:43,191 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-07-13 19:38:43,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-07-13 19:38:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:43,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:43,191 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:43,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 19:38:43,405 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1534447262, now seen corresponding path program 50 times [2021-07-13 19:38:43,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:43,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46129904] [2021-07-13 19:38:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:43,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46129904] [2021-07-13 19:38:43,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46129904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:43,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332250414] [2021-07-13 19:38:43,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:43,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:43,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:43,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:43,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:43,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:43,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:43,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:43,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:43,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:43,794 INFO L628 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2021-07-13 19:38:43,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:43,796 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-07-13 19:38:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332250414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:43,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:43,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:38:43,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198433199] [2021-07-13 19:38:43,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:43,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:43,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:43,898 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:44,284 INFO L93 Difference]: Finished difference Result 94 states and 188 transitions. [2021-07-13 19:38:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:44,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:44,284 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:38:44,285 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:38:44,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:38:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2021-07-13 19:38:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 147 transitions. [2021-07-13 19:38:44,287 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 147 transitions. Word has length 16 [2021-07-13 19:38:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:44,287 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 147 transitions. [2021-07-13 19:38:44,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 147 transitions. [2021-07-13 19:38:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:44,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:44,287 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:44,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-07-13 19:38:44,510 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2072302840, now seen corresponding path program 51 times [2021-07-13 19:38:44,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:44,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547509365] [2021-07-13 19:38:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:44,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547509365] [2021-07-13 19:38:44,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547509365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:44,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124986642] [2021-07-13 19:38:44,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:44,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:38:44,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:44,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:44,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:44,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:44,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:44,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:44,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:44,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:44,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:44,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:44,916 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:44,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:44,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:44,947 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:147, output treesize:58 [2021-07-13 19:38:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:45,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124986642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:45,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:45,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:38:45,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475795102] [2021-07-13 19:38:45,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:45,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:45,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:45,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:45,051 INFO L87 Difference]: Start difference. First operand 72 states and 147 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:45,364 INFO L93 Difference]: Finished difference Result 108 states and 212 transitions. [2021-07-13 19:38:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:45,365 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:38:45,365 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:38:45,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:38:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-07-13 19:38:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 73 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 152 transitions. [2021-07-13 19:38:45,366 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 152 transitions. Word has length 16 [2021-07-13 19:38:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:45,366 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 152 transitions. [2021-07-13 19:38:45,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 152 transitions. [2021-07-13 19:38:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:45,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:45,367 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:45,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-07-13 19:38:45,568 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:45,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1671841100, now seen corresponding path program 52 times [2021-07-13 19:38:45,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:45,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899410841] [2021-07-13 19:38:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:45,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:45,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899410841] [2021-07-13 19:38:45,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899410841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:45,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945230610] [2021-07-13 19:38:45,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:45,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:45,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:45,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:45,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:45,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:45,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:45,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:45,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:45,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:45,981 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,014 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:38:46,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:46,015 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:156, output treesize:43 [2021-07-13 19:38:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:46,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945230610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:46,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:46,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:38:46,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432462654] [2021-07-13 19:38:46,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:46,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:46,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:46,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:46,067 INFO L87 Difference]: Start difference. First operand 74 states and 152 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:46,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:46,387 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2021-07-13 19:38:46,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:38:46,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:46,388 INFO L225 Difference]: With dead ends: 95 [2021-07-13 19:38:46,388 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:38:46,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:38:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:38:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2021-07-13 19:38:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 159 transitions. [2021-07-13 19:38:46,390 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 159 transitions. Word has length 16 [2021-07-13 19:38:46,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:46,390 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 159 transitions. [2021-07-13 19:38:46,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 159 transitions. [2021-07-13 19:38:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:46,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:46,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:46,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-13 19:38:46,609 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:46,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1277385096, now seen corresponding path program 53 times [2021-07-13 19:38:46,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:46,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279546164] [2021-07-13 19:38:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:46,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:46,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279546164] [2021-07-13 19:38:46,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279546164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:46,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69112558] [2021-07-13 19:38:46,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:46,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:38:46,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:46,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:47,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:47,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:47,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:47,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:47,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:47,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,114 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-07-13 19:38:47,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:47,115 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:145, output treesize:58 [2021-07-13 19:38:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:47,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69112558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:47,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:47,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:38:47,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307944618] [2021-07-13 19:38:47,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:38:47,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:47,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:38:47,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:38:47,212 INFO L87 Difference]: Start difference. First operand 77 states and 159 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:47,720 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-07-13 19:38:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:47,721 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:38:47,721 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:38:47,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:38:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2021-07-13 19:38:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.08) internal successors, (156), 75 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 156 transitions. [2021-07-13 19:38:47,723 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 156 transitions. Word has length 16 [2021-07-13 19:38:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:47,723 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 156 transitions. [2021-07-13 19:38:47,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 156 transitions. [2021-07-13 19:38:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:47,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:47,724 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:47,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:47,933 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash -739529518, now seen corresponding path program 54 times [2021-07-13 19:38:47,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:47,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856554077] [2021-07-13 19:38:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:48,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:48,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856554077] [2021-07-13 19:38:48,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856554077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:48,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113359556] [2021-07-13 19:38:48,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:48,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:48,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:48,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:48,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:48,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:48,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:48,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:48,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:48,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:48,353 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:48,393 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-07-13 19:38:48,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:48,394 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:211, output treesize:52 [2021-07-13 19:38:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:48,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113359556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:48,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:48,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:38:48,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639431923] [2021-07-13 19:38:48,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:38:48,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:48,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:38:48,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:38:48,517 INFO L87 Difference]: Start difference. First operand 76 states and 156 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:48,838 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2021-07-13 19:38:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:48,839 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:38:48,839 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:38:48,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:38:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2021-07-13 19:38:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 159 transitions. [2021-07-13 19:38:48,841 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 159 transitions. Word has length 16 [2021-07-13 19:38:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:48,841 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 159 transitions. [2021-07-13 19:38:48,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 159 transitions. [2021-07-13 19:38:48,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:48,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:48,841 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:49,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-07-13 19:38:49,045 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1245875784, now seen corresponding path program 55 times [2021-07-13 19:38:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:49,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853528670] [2021-07-13 19:38:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:49,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:49,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853528670] [2021-07-13 19:38:49,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853528670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:49,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255154436] [2021-07-13 19:38:49,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:49,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:49,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:49,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:49,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:49,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:49,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:49,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:49,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,538 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-07-13 19:38:49,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:49,539 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-07-13 19:38:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:49,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255154436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:49,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:49,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:38:49,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314001801] [2021-07-13 19:38:49,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:49,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:49,620 INFO L87 Difference]: Start difference. First operand 77 states and 159 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:49,995 INFO L93 Difference]: Finished difference Result 100 states and 202 transitions. [2021-07-13 19:38:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:38:49,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:49,995 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:38:49,995 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:38:49,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 612.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:38:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2021-07-13 19:38:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-07-13 19:38:49,997 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 16 [2021-07-13 19:38:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:49,998 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-07-13 19:38:49,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-07-13 19:38:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:49,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:49,998 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:50,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:50,213 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2123859110, now seen corresponding path program 56 times [2021-07-13 19:38:50,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:50,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644652185] [2021-07-13 19:38:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:50,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:50,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644652185] [2021-07-13 19:38:50,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644652185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:50,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324253501] [2021-07-13 19:38:50,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:50,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:50,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:50,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:50,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:50,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:50,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:50,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:50,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:50,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:50,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:50,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:38:50,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:50,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:50,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:50,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:50,919 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:50,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:50,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:50,924 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:50,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:50,956 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 19:38:50,956 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:375, output treesize:35 [2021-07-13 19:38:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:50,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324253501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:50,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:50,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:38:50,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385301338] [2021-07-13 19:38:50,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:50,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:50,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:50,999 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:51,291 INFO L93 Difference]: Finished difference Result 105 states and 211 transitions. [2021-07-13 19:38:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:38:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:51,292 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:38:51,292 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:38:51,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:38:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2021-07-13 19:38:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-07-13 19:38:51,294 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 16 [2021-07-13 19:38:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:51,294 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-07-13 19:38:51,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-07-13 19:38:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:51,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:51,295 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:51,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-07-13 19:38:51,509 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1467093346, now seen corresponding path program 57 times [2021-07-13 19:38:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:51,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822144650] [2021-07-13 19:38:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:51,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822144650] [2021-07-13 19:38:51,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822144650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542893494] [2021-07-13 19:38:51,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:51,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:51,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:51,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:52,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:52,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:52,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:52,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:38:52,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:52,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:52,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:52,284 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:52,319 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 19:38:52,319 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:273, output treesize:35 [2021-07-13 19:38:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:52,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542893494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:52,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:52,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:38:52,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781720973] [2021-07-13 19:38:52,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:52,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:52,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:52,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:52,374 INFO L87 Difference]: Start difference. First operand 81 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:52,638 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-07-13 19:38:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:52,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:52,639 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:38:52,639 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:38:52,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:38:52,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-07-13 19:38:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 169 transitions. [2021-07-13 19:38:52,641 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 169 transitions. Word has length 16 [2021-07-13 19:38:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:52,641 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 169 transitions. [2021-07-13 19:38:52,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 169 transitions. [2021-07-13 19:38:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:52,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:52,642 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:52,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:52,843 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1861549350, now seen corresponding path program 58 times [2021-07-13 19:38:52,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:52,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856798343] [2021-07-13 19:38:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:52,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:52,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856798343] [2021-07-13 19:38:52,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856798343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:52,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896923872] [2021-07-13 19:38:52,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:53,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:53,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:53,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:53,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:53,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:53,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:38:53,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:53,591 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:53,598 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:38:53,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:53,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:53,611 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:53,616 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:53,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:53,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:53,627 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:53,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:53,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:53,677 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:646, output treesize:58 [2021-07-13 19:38:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:53,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896923872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:53,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:53,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:38:53,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024031608] [2021-07-13 19:38:53,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:53,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:53,768 INFO L87 Difference]: Start difference. First operand 82 states and 169 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:54,003 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-07-13 19:38:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:54,004 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:38:54,004 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:38:54,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:38:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2021-07-13 19:38:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2021-07-13 19:38:54,005 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 16 [2021-07-13 19:38:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:54,005 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2021-07-13 19:38:54,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2021-07-13 19:38:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:54,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:54,006 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:54,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-07-13 19:38:54,206 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:54,207 INFO L82 PathProgramCache]: Analyzing trace with hash 960747080, now seen corresponding path program 59 times [2021-07-13 19:38:54,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:54,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439231209] [2021-07-13 19:38:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:54,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:54,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439231209] [2021-07-13 19:38:54,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439231209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:54,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960678236] [2021-07-13 19:38:54,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:54,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:54,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:54,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:54,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:54,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:54,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:54,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:54,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:54,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,585 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:38:54,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:54,585 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:131, output treesize:43 [2021-07-13 19:38:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:54,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960678236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:54,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:54,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:38:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126025241] [2021-07-13 19:38:54,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:38:54,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:38:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:54,634 INFO L87 Difference]: Start difference. First operand 83 states and 171 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:54,846 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-07-13 19:38:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:38:54,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:54,846 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:38:54,846 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:38:54,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:38:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2021-07-13 19:38:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-07-13 19:38:54,848 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 16 [2021-07-13 19:38:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:54,848 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-07-13 19:38:54,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-07-13 19:38:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:54,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:54,849 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:55,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:55,057 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1355203084, now seen corresponding path program 60 times [2021-07-13 19:38:55,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:55,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385088440] [2021-07-13 19:38:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:55,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:55,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385088440] [2021-07-13 19:38:55,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385088440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:55,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240542277] [2021-07-13 19:38:55,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:55,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:55,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:55,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:55,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:55,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:55,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:38:55,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:55,814 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:55,821 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:38:55,829 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:55,835 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:55,841 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:55,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:55,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:55,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:55,901 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:58 [2021-07-13 19:38:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:56,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240542277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:56,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:56,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:56,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469614015] [2021-07-13 19:38:56,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:56,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:56,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:56,009 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:56,582 INFO L93 Difference]: Finished difference Result 178 states and 326 transitions. [2021-07-13 19:38:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:38:56,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:56,583 INFO L225 Difference]: With dead ends: 178 [2021-07-13 19:38:56,583 INFO L226 Difference]: Without dead ends: 152 [2021-07-13 19:38:56,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 762.0ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:38:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-13 19:38:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 87. [2021-07-13 19:38:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.116279069767442) internal successors, (182), 86 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 182 transitions. [2021-07-13 19:38:56,585 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 182 transitions. Word has length 16 [2021-07-13 19:38:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:56,585 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 182 transitions. [2021-07-13 19:38:56,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 182 transitions. [2021-07-13 19:38:56,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:56,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:56,585 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:56,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-07-13 19:38:56,786 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:56,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1893058662, now seen corresponding path program 61 times [2021-07-13 19:38:56,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:56,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044135705] [2021-07-13 19:38:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:56,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:56,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044135705] [2021-07-13 19:38:56,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044135705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:56,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591156644] [2021-07-13 19:38:56,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:57,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:57,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:57,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:57,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:57,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:57,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:57,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:57,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:57,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:57,201 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-07-13 19:38:57,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:57,202 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-07-13 19:38:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:57,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591156644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:57,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:57,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:38:57,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816638701] [2021-07-13 19:38:57,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:57,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:57,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:57,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:57,299 INFO L87 Difference]: Start difference. First operand 87 states and 182 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:57,492 INFO L93 Difference]: Finished difference Result 106 states and 218 transitions. [2021-07-13 19:38:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:57,493 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:38:57,493 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:38:57,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:38:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-07-13 19:38:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.116279069767442) internal successors, (182), 86 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 182 transitions. [2021-07-13 19:38:57,494 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 182 transitions. Word has length 16 [2021-07-13 19:38:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:57,495 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 182 transitions. [2021-07-13 19:38:57,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 182 transitions. [2021-07-13 19:38:57,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:57,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:57,495 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:57,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:57,695 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:57,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1851085278, now seen corresponding path program 62 times [2021-07-13 19:38:57,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:57,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519724006] [2021-07-13 19:38:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:57,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:57,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519724006] [2021-07-13 19:38:57,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519724006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:57,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724317002] [2021-07-13 19:38:57,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:57,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:57,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:57,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:57,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:58,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:58,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:58,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:58,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:38:58,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:58,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:58,361 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:58,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:58,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:58,371 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:58,409 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 19:38:58,409 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:371, output treesize:35 [2021-07-13 19:38:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:58,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724317002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:58,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:58,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:38:58,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169988515] [2021-07-13 19:38:58,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:38:58,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:58,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:38:58,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:58,465 INFO L87 Difference]: Start difference. First operand 87 states and 182 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:58,694 INFO L93 Difference]: Finished difference Result 109 states and 221 transitions. [2021-07-13 19:38:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:58,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:38:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:58,695 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:38:58,695 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:38:58,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:38:58,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-07-13 19:38:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-07-13 19:38:58,696 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-07-13 19:38:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:58,696 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-07-13 19:38:58,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-07-13 19:38:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:38:58,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:58,697 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:58,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-07-13 19:38:58,897 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1456629274, now seen corresponding path program 63 times [2021-07-13 19:38:58,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:58,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107741334] [2021-07-13 19:38:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:59,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:59,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107741334] [2021-07-13 19:38:59,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107741334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:59,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047188336] [2021-07-13 19:38:59,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:59,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:38:59,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:59,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:59,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:59,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:59,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:59,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:38:59,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:38:59,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:38:59,461 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:38:59,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:59,471 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:59,476 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:59,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:38:59,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:59,589 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-13 19:38:59,589 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.3 percent of original size [2021-07-13 19:38:59,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:38:59,592 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:71 [2021-07-13 19:38:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:59,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047188336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:59,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:59,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:38:59,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034531774] [2021-07-13 19:38:59,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:38:59,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:59,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:38:59,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:59,720 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:00,013 INFO L93 Difference]: Finished difference Result 106 states and 218 transitions. [2021-07-13 19:39:00,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:00,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:39:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:00,014 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:39:00,014 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:39:00,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:39:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2021-07-13 19:39:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-07-13 19:39:00,016 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-07-13 19:39:00,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:00,016 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-07-13 19:39:00,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,016 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-07-13 19:39:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:39:00,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:00,016 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:00,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable806 [2021-07-13 19:39:00,233 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:00,233 INFO L82 PathProgramCache]: Analyzing trace with hash -918773696, now seen corresponding path program 64 times [2021-07-13 19:39:00,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:00,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851260519] [2021-07-13 19:39:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:00,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:00,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851260519] [2021-07-13 19:39:00,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851260519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:00,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212073053] [2021-07-13 19:39:00,417 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 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 19:39:00,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:00,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:00,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-07-13 19:39:00,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:39:00,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:39:00,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:00,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:00,802 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:00,808 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:39:00,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:00,819 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:39:00,825 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:00,830 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:39:00,837 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:00,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:00,842 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,915 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-07-13 19:39:00,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:00,917 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:515, output treesize:52 [2021-07-13 19:39:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:01,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212073053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:01,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:01,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:39:01,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991814591] [2021-07-13 19:39:01,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:01,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:01,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:01,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:01,016 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:01,290 INFO L93 Difference]: Finished difference Result 111 states and 229 transitions. [2021-07-13 19:39:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:01,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:39:01,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:01,290 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:39:01,290 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:39:01,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:01,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:39:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2021-07-13 19:39:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-07-13 19:39:01,292 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-07-13 19:39:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:01,292 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-07-13 19:39:01,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-07-13 19:39:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:39:01,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:01,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:01,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable836 [2021-07-13 19:39:01,509 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1425119962, now seen corresponding path program 65 times [2021-07-13 19:39:01,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:01,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848883788] [2021-07-13 19:39:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:01,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848883788] [2021-07-13 19:39:01,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848883788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780452517] [2021-07-13 19:39:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:01,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:01,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:01,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:01,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:01,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:01,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:01,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:01,858 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:01,861 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:01,864 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:01,903 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-07-13 19:39:01,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:01,904 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:207, output treesize:52 [2021-07-13 19:39:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:02,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780452517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:02,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:02,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:02,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009827328] [2021-07-13 19:39:02,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:02,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:02,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:02,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:02,004 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:02,428 INFO L93 Difference]: Finished difference Result 114 states and 235 transitions. [2021-07-13 19:39:02,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:02,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:39:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:02,429 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:39:02,429 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:39:02,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:39:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:39:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 90. [2021-07-13 19:39:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-07-13 19:39:02,431 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-07-13 19:39:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:02,431 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-07-13 19:39:02,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-07-13 19:39:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:39:02,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:02,432 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:02,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:02,632 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash 331453388, now seen corresponding path program 66 times [2021-07-13 19:39:02,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:02,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596630752] [2021-07-13 19:39:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:02,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596630752] [2021-07-13 19:39:02,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596630752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002450503] [2021-07-13 19:39:02,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:02,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:02,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:02,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:39:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:03,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:03,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:39:03,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:39:03,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:39:03,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:39:03,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:39:03,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:03,446 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:03,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:03,450 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:03,480 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 19:39:03,480 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:375, output treesize:35 [2021-07-13 19:39:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:03,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002450503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:03,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:03,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:39:03,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223293365] [2021-07-13 19:39:03,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:39:03,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:39:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:03,559 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:03,806 INFO L93 Difference]: Finished difference Result 114 states and 231 transitions. [2021-07-13 19:39:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:39:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:39:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:03,807 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:39:03,807 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:39:03,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:39:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2021-07-13 19:39:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 190 transitions. [2021-07-13 19:39:03,809 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 190 transitions. Word has length 16 [2021-07-13 19:39:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:03,809 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 190 transitions. [2021-07-13 19:39:03,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 190 transitions. [2021-07-13 19:39:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:39:03,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:03,809 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:04,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable914 [2021-07-13 19:39:04,010 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:04,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:04,010 INFO L82 PathProgramCache]: Analyzing trace with hash 725909392, now seen corresponding path program 67 times [2021-07-13 19:39:04,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:04,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948153000] [2021-07-13 19:39:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:04,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:04,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948153000] [2021-07-13 19:39:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948153000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:04,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423455965] [2021-07-13 19:39:04,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:04,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:04,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:04,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:04,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:39:04,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:39:04,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:39:04,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:39:04,609 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:39:04,629 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:04,635 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:04,639 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:04,644 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:04,649 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:04,654 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:04,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:04,658 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:04,771 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 19:39:04,771 INFO L628 ElimStorePlain]: treesize reduction 40, result has 77.1 percent of original size [2021-07-13 19:39:04,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:39:04,775 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:626, output treesize:71 [2021-07-13 19:39:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:04,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423455965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:04,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:04,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:39:04,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302824338] [2021-07-13 19:39:04,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:04,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:04,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:04,911 INFO L87 Difference]: Start difference. First operand 91 states and 190 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:05,223 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-07-13 19:39:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:39:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:05,224 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:39:05,224 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:39:05,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:05,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:39:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2021-07-13 19:39:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-07-13 19:39:05,226 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-07-13 19:39:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:05,226 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-07-13 19:39:05,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-07-13 19:39:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:39:05,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:05,226 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:05,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:05,427 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:05,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:05,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1263764970, now seen corresponding path program 68 times [2021-07-13 19:39:05,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:05,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081359916] [2021-07-13 19:39:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:05,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081359916] [2021-07-13 19:39:05,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081359916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579190004] [2021-07-13 19:39:05,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:05,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:05,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:06,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:06,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-07-13 19:39:06,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:06,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:39:06,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:39:06,050 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:06,055 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:06,060 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:39:06,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:06,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:39:06,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:06,183 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-13 19:39:06,184 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.3 percent of original size [2021-07-13 19:39:06,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:39:06,185 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:71 [2021-07-13 19:39:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:06,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579190004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:06,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:06,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:39:06,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921475211] [2021-07-13 19:39:06,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:06,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:06,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:06,303 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:06,608 INFO L93 Difference]: Finished difference Result 112 states and 229 transitions. [2021-07-13 19:39:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:06,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:39:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:06,609 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:39:06,609 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:39:06,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:39:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2021-07-13 19:39:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1136363636363638) internal successors, (186), 88 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 186 transitions. [2021-07-13 19:39:06,611 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 186 transitions. Word has length 16 [2021-07-13 19:39:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:06,611 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 186 transitions. [2021-07-13 19:39:06,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 186 transitions. [2021-07-13 19:39:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:39:06,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:06,612 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:06,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-07-13 19:39:06,817 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 757418704, now seen corresponding path program 69 times [2021-07-13 19:39:06,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:06,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221674283] [2021-07-13 19:39:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:06,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:06,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221674283] [2021-07-13 19:39:06,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221674283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:06,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336173705] [2021-07-13 19:39:06,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:07,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:07,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:07,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:39:07,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:07,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:07,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:07,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:07,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:07,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:07,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:07,196 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:07,200 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:07,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:07,229 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:222, output treesize:58 [2021-07-13 19:39:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336173705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:07,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:39:07,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792514573] [2021-07-13 19:39:07,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:07,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:07,331 INFO L87 Difference]: Start difference. First operand 89 states and 186 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:07,543 INFO L93 Difference]: Finished difference Result 121 states and 247 transitions. [2021-07-13 19:39:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:39:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:07,544 INFO L225 Difference]: With dead ends: 121 [2021-07-13 19:39:07,544 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 19:39:07,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:07,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 19:39:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-07-13 19:39:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1333333333333333) internal successors, (192), 90 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 192 transitions. [2021-07-13 19:39:07,546 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 192 transitions. Word has length 16 [2021-07-13 19:39:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:07,546 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 192 transitions. [2021-07-13 19:39:07,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 192 transitions. [2021-07-13 19:39:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:39:07,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:07,547 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:07,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:07,747 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1797654502, now seen corresponding path program 70 times [2021-07-13 19:39:07,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:07,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11337549] [2021-07-13 19:39:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:07,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11337549] [2021-07-13 19:39:07,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11337549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401767634] [2021-07-13 19:39:07,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:07,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:07,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:39:07,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:08,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:08,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:08,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:08,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:08,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:08,197 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:08,200 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:08,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:08,227 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:183, output treesize:58 [2021-07-13 19:39:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:08,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401767634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:08,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:08,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:39:08,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321402973] [2021-07-13 19:39:08,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:39:08,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:08,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:39:08,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:08,322 INFO L87 Difference]: Start difference. First operand 91 states and 192 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:08,739 INFO L93 Difference]: Finished difference Result 150 states and 305 transitions. [2021-07-13 19:39:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:08,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:39:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:08,740 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:39:08,740 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:39:08,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 626.8ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:39:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2021-07-13 19:39:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.129032258064516) internal successors, (198), 93 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 198 transitions. [2021-07-13 19:39:08,741 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 198 transitions. Word has length 16 [2021-07-13 19:39:08,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:08,741 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 198 transitions. [2021-07-13 19:39:08,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 198 transitions. [2021-07-13 19:39:08,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:08,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:08,742 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:08,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:08,942 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1403613350, now seen corresponding path program 71 times [2021-07-13 19:39:08,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:08,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119787473] [2021-07-13 19:39:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:09,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119787473] [2021-07-13 19:39:09,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119787473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254327000] [2021-07-13 19:39:09,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:09,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:09,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:09,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:09,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254327000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:09,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:39:09,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980133113] [2021-07-13 19:39:09,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:39:09,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:09,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:39:09,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:09,092 INFO L87 Difference]: Start difference. First operand 94 states and 198 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:09,163 INFO L93 Difference]: Finished difference Result 132 states and 269 transitions. [2021-07-13 19:39:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:09,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:09,164 INFO L225 Difference]: With dead ends: 132 [2021-07-13 19:39:09,164 INFO L226 Difference]: Without dead ends: 132 [2021-07-13 19:39:09,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-13 19:39:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 95. [2021-07-13 19:39:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 201 transitions. [2021-07-13 19:39:09,166 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 201 transitions. Word has length 17 [2021-07-13 19:39:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:09,166 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 201 transitions. [2021-07-13 19:39:09,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 201 transitions. [2021-07-13 19:39:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:09,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:09,167 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:09,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1122,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:09,381 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:09,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:09,381 INFO L82 PathProgramCache]: Analyzing trace with hash -298435961, now seen corresponding path program 72 times [2021-07-13 19:39:09,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:09,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869480771] [2021-07-13 19:39:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:09,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869480771] [2021-07-13 19:39:09,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869480771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984778682] [2021-07-13 19:39:09,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:09,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:09,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984778682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:09,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:09,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755568362] [2021-07-13 19:39:09,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:09,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:09,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:09,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:09,587 INFO L87 Difference]: Start difference. First operand 95 states and 201 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:09,712 INFO L93 Difference]: Finished difference Result 130 states and 260 transitions. [2021-07-13 19:39:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:09,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:09,713 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:39:09,713 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 19:39:09,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 19:39:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2021-07-13 19:39:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.129032258064516) internal successors, (198), 93 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 198 transitions. [2021-07-13 19:39:09,717 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 198 transitions. Word has length 17 [2021-07-13 19:39:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:09,717 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 198 transitions. [2021-07-13 19:39:09,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 198 transitions. [2021-07-13 19:39:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:09,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:09,718 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:09,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-07-13 19:39:09,933 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1912548616, now seen corresponding path program 73 times [2021-07-13 19:39:09,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:09,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862726897] [2021-07-13 19:39:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:10,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862726897] [2021-07-13 19:39:10,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862726897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071065651] [2021-07-13 19:39:10,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:10,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071065651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:10,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:10,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077796462] [2021-07-13 19:39:10,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:10,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:10,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:10,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:10,133 INFO L87 Difference]: Start difference. First operand 94 states and 198 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:10,224 INFO L93 Difference]: Finished difference Result 123 states and 254 transitions. [2021-07-13 19:39:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:10,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:10,225 INFO L225 Difference]: With dead ends: 123 [2021-07-13 19:39:10,225 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:39:10,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:39:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-07-13 19:39:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-07-13 19:39:10,229 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 17 [2021-07-13 19:39:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:10,229 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-07-13 19:39:10,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-07-13 19:39:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:10,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:10,230 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:10,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1129,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:10,445 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 816661835, now seen corresponding path program 74 times [2021-07-13 19:39:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285459875] [2021-07-13 19:39:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:10,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285459875] [2021-07-13 19:39:10,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285459875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998197889] [2021-07-13 19:39:10,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:10,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:10,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:10,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:10,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998197889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:10,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:10,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27607171] [2021-07-13 19:39:10,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:10,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:10,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:10,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:10,697 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:10,810 INFO L93 Difference]: Finished difference Result 128 states and 257 transitions. [2021-07-13 19:39:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:10,811 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:10,811 INFO L225 Difference]: With dead ends: 128 [2021-07-13 19:39:10,811 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:39:10,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:39:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 95. [2021-07-13 19:39:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-07-13 19:39:10,813 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 17 [2021-07-13 19:39:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:10,813 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-07-13 19:39:10,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-07-13 19:39:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:10,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:10,814 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:11,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:11,014 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:11,014 INFO L82 PathProgramCache]: Analyzing trace with hash 749436586, now seen corresponding path program 75 times [2021-07-13 19:39:11,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:11,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99758276] [2021-07-13 19:39:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:11,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:11,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99758276] [2021-07-13 19:39:11,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99758276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:11,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273794011] [2021-07-13 19:39:11,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:11,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:11,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:11,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:11,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273794011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:11,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:11,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:11,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757566450] [2021-07-13 19:39:11,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:11,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:11,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:11,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:11,291 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:11,545 INFO L93 Difference]: Finished difference Result 120 states and 248 transitions. [2021-07-13 19:39:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:11,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:11,546 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:39:11,546 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:39:11,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:39:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:39:11,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-07-13 19:39:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-07-13 19:39:11,548 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-07-13 19:39:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:11,548 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-07-13 19:39:11,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-07-13 19:39:11,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:11,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:11,548 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:11,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-07-13 19:39:11,757 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:11,757 INFO L82 PathProgramCache]: Analyzing trace with hash 159896071, now seen corresponding path program 76 times [2021-07-13 19:39:11,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:11,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878443152] [2021-07-13 19:39:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:11,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:11,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878443152] [2021-07-13 19:39:11,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878443152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:11,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563702497] [2021-07-13 19:39:11,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:11,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:11,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:11,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563702497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:11,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:11,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:11,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216534403] [2021-07-13 19:39:11,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:11,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:11,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:11,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:11,988 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:12,171 INFO L93 Difference]: Finished difference Result 131 states and 264 transitions. [2021-07-13 19:39:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:12,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:12,172 INFO L225 Difference]: With dead ends: 131 [2021-07-13 19:39:12,172 INFO L226 Difference]: Without dead ends: 128 [2021-07-13 19:39:12,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-13 19:39:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2021-07-13 19:39:12,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-07-13 19:39:12,174 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-07-13 19:39:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:12,174 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-07-13 19:39:12,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-07-13 19:39:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:12,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:12,174 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:12,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1138 [2021-07-13 19:39:12,385 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:12,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1681748168, now seen corresponding path program 77 times [2021-07-13 19:39:12,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:12,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703301936] [2021-07-13 19:39:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:12,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:12,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703301936] [2021-07-13 19:39:12,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703301936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:12,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266794034] [2021-07-13 19:39:12,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:12,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:12,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:12,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:12,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266794034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:12,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:12,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:12,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918885379] [2021-07-13 19:39:12,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:12,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:12,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:12,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:12,622 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:12,872 INFO L93 Difference]: Finished difference Result 124 states and 255 transitions. [2021-07-13 19:39:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:12,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:12,873 INFO L225 Difference]: With dead ends: 124 [2021-07-13 19:39:12,873 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:39:12,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:39:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:39:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2021-07-13 19:39:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-07-13 19:39:12,875 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-07-13 19:39:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:12,875 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-07-13 19:39:12,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-07-13 19:39:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:12,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:12,875 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:13,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:13,076 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:13,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:13,076 INFO L82 PathProgramCache]: Analyzing trace with hash -841823398, now seen corresponding path program 78 times [2021-07-13 19:39:13,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:13,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044147965] [2021-07-13 19:39:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:13,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:13,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044147965] [2021-07-13 19:39:13,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044147965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:13,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750865104] [2021-07-13 19:39:13,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:13,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:13,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:13,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:13,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750865104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:13,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:13,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:13,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379239412] [2021-07-13 19:39:13,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:13,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:13,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:13,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:13,269 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:13,333 INFO L93 Difference]: Finished difference Result 114 states and 237 transitions. [2021-07-13 19:39:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:13,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:13,334 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:39:13,334 INFO L226 Difference]: Without dead ends: 114 [2021-07-13 19:39:13,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-13 19:39:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-07-13 19:39:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-07-13 19:39:13,335 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-07-13 19:39:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:13,335 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-07-13 19:39:13,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-07-13 19:39:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:13,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:13,336 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:13,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:13,536 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1937710179, now seen corresponding path program 79 times [2021-07-13 19:39:13,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:13,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035099079] [2021-07-13 19:39:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:13,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:13,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035099079] [2021-07-13 19:39:13,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035099079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:13,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109038052] [2021-07-13 19:39:13,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:13,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109038052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:13,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:13,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:13,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181461861] [2021-07-13 19:39:13,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:13,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:13,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:13,788 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:13,871 INFO L93 Difference]: Finished difference Result 109 states and 223 transitions. [2021-07-13 19:39:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:13,872 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:39:13,872 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:39:13,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:39:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2021-07-13 19:39:13,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 206 transitions. [2021-07-13 19:39:13,874 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 206 transitions. Word has length 17 [2021-07-13 19:39:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:13,874 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 206 transitions. [2021-07-13 19:39:13,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 206 transitions. [2021-07-13 19:39:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:13,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:13,875 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:14,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-07-13 19:39:14,089 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:14,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2004935428, now seen corresponding path program 80 times [2021-07-13 19:39:14,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:14,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504096816] [2021-07-13 19:39:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:14,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504096816] [2021-07-13 19:39:14,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504096816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347822788] [2021-07-13 19:39:14,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:14,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:14,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:14,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:14,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347822788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:14,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:14,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655542402] [2021-07-13 19:39:14,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:14,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:14,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:14,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:14,352 INFO L87 Difference]: Start difference. First operand 98 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:14,450 INFO L93 Difference]: Finished difference Result 127 states and 263 transitions. [2021-07-13 19:39:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:14,451 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:39:14,451 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:39:14,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:39:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-07-13 19:39:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 206 transitions. [2021-07-13 19:39:14,452 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 206 transitions. Word has length 17 [2021-07-13 19:39:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:14,452 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 206 transitions. [2021-07-13 19:39:14,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 206 transitions. [2021-07-13 19:39:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:14,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:14,453 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:14,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1159 [2021-07-13 19:39:14,653 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1485565718, now seen corresponding path program 81 times [2021-07-13 19:39:14,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:14,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032051321] [2021-07-13 19:39:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:14,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032051321] [2021-07-13 19:39:14,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032051321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964850590] [2021-07-13 19:39:14,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:39:14,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:14,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:14,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964850590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:14,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:14,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190347421] [2021-07-13 19:39:14,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:14,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:14,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:14,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:14,892 INFO L87 Difference]: Start difference. First operand 98 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:15,053 INFO L93 Difference]: Finished difference Result 133 states and 276 transitions. [2021-07-13 19:39:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:15,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:15,054 INFO L225 Difference]: With dead ends: 133 [2021-07-13 19:39:15,054 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:39:15,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:39:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2021-07-13 19:39:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.122448979591837) internal successors, (208), 98 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 208 transitions. [2021-07-13 19:39:15,056 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 208 transitions. Word has length 17 [2021-07-13 19:39:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:15,056 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 208 transitions. [2021-07-13 19:39:15,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 208 transitions. [2021-07-13 19:39:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:15,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:15,057 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:15,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:15,273 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2094947357, now seen corresponding path program 82 times [2021-07-13 19:39:15,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:15,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782813547] [2021-07-13 19:39:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:15,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782813547] [2021-07-13 19:39:15,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782813547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388636724] [2021-07-13 19:39:15,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:15,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:15,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:15,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:15,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388636724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:15,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399947315] [2021-07-13 19:39:15,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:15,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:15,490 INFO L87 Difference]: Start difference. First operand 99 states and 208 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:15,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:15,575 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2021-07-13 19:39:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:15,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:15,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:15,576 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:39:15,576 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:39:15,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:39:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2021-07-13 19:39:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-07-13 19:39:15,578 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-07-13 19:39:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:15,578 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-07-13 19:39:15,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-07-13 19:39:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:15,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:15,578 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:15,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-07-13 19:39:15,779 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash -454575241, now seen corresponding path program 83 times [2021-07-13 19:39:15,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:15,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392693036] [2021-07-13 19:39:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392693036] [2021-07-13 19:39:15,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392693036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553005107] [2021-07-13 19:39:15,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:15,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:15,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:15,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:16,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553005107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:16,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:16,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:16,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492209648] [2021-07-13 19:39:16,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:16,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:16,079 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:16,287 INFO L93 Difference]: Finished difference Result 108 states and 221 transitions. [2021-07-13 19:39:16,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:16,287 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:16,287 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:39:16,287 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:39:16,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:39:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-07-13 19:39:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-07-13 19:39:16,289 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-07-13 19:39:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:16,289 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-07-13 19:39:16,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-07-13 19:39:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:16,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:16,290 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:16,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:16,509 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:16,509 INFO L82 PathProgramCache]: Analyzing trace with hash -521800490, now seen corresponding path program 84 times [2021-07-13 19:39:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:16,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795301613] [2021-07-13 19:39:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:16,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:16,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795301613] [2021-07-13 19:39:16,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795301613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:16,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697447629] [2021-07-13 19:39:16,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:16,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:16,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:16,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:16,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697447629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:16,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:16,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:16,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261188957] [2021-07-13 19:39:16,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:16,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:16,788 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:16,901 INFO L93 Difference]: Finished difference Result 110 states and 229 transitions. [2021-07-13 19:39:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:16,901 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:39:16,901 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:39:16,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:39:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2021-07-13 19:39:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-07-13 19:39:16,903 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-07-13 19:39:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:16,903 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-07-13 19:39:16,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-07-13 19:39:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:16,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:16,904 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:17,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1187 [2021-07-13 19:39:17,117 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1111341005, now seen corresponding path program 85 times [2021-07-13 19:39:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822638686] [2021-07-13 19:39:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:17,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822638686] [2021-07-13 19:39:17,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822638686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826379257] [2021-07-13 19:39:17,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:17,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:17,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:39:17,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:17,402 INFO L628 ElimStorePlain]: treesize reduction 1, result has 92.3 percent of original size [2021-07-13 19:39:17,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:17,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 19:39:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826379257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:17,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697208354] [2021-07-13 19:39:17,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:17,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:17,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:17,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:17,435 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:17,573 INFO L93 Difference]: Finished difference Result 123 states and 246 transitions. [2021-07-13 19:39:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:17,574 INFO L225 Difference]: With dead ends: 123 [2021-07-13 19:39:17,574 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:39:17,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:39:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-07-13 19:39:17,576 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 19:39:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-07-13 19:39:17,576 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 17 [2021-07-13 19:39:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:17,576 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-07-13 19:39:17,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-07-13 19:39:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:17,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:17,577 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:17,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-07-13 19:39:17,778 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:17,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:17,778 INFO L82 PathProgramCache]: Analyzing trace with hash 410511092, now seen corresponding path program 86 times [2021-07-13 19:39:17,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:17,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769637727] [2021-07-13 19:39:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:17,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769637727] [2021-07-13 19:39:17,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769637727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105612239] [2021-07-13 19:39:17,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:17,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:18,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105612239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:18,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:18,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917105651] [2021-07-13 19:39:18,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:18,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:18,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:18,012 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:18,114 INFO L93 Difference]: Finished difference Result 136 states and 275 transitions. [2021-07-13 19:39:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:18,115 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:39:18,115 INFO L226 Difference]: Without dead ends: 136 [2021-07-13 19:39:18,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-13 19:39:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 102. [2021-07-13 19:39:18,117 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 19:39:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-07-13 19:39:18,117 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 17 [2021-07-13 19:39:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:18,117 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-07-13 19:39:18,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-07-13 19:39:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:18,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:18,118 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:18,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,329 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:18,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash -716885001, now seen corresponding path program 87 times [2021-07-13 19:39:18,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:18,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455840170] [2021-07-13 19:39:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:18,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455840170] [2021-07-13 19:39:18,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455840170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489435603] [2021-07-13 19:39:18,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:18,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:18,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:18,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:18,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:39:18,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,584 INFO L628 ElimStorePlain]: treesize reduction 1, result has 92.3 percent of original size [2021-07-13 19:39:18,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:18,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 19:39:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:18,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489435603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:18,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:18,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333248432] [2021-07-13 19:39:18,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:18,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:18,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:18,607 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:18,749 INFO L93 Difference]: Finished difference Result 108 states and 225 transitions. [2021-07-13 19:39:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:18,750 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:39:18,750 INFO L226 Difference]: Without dead ends: 108 [2021-07-13 19:39:18,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-13 19:39:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2021-07-13 19:39:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-07-13 19:39:18,752 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-07-13 19:39:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:18,752 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-07-13 19:39:18,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-07-13 19:39:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:18,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:18,753 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:18,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1211,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,976 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1652543352, now seen corresponding path program 88 times [2021-07-13 19:39:18,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:18,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175373334] [2021-07-13 19:39:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:19,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175373334] [2021-07-13 19:39:19,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175373334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856125234] [2021-07-13 19:39:19,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:19,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:19,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:19,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:19,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:19,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856125234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:19,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:19,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:19,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927700893] [2021-07-13 19:39:19,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:19,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:19,246 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:19,337 INFO L93 Difference]: Finished difference Result 113 states and 233 transitions. [2021-07-13 19:39:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:19,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:19,343 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:39:19,343 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:39:19,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:39:19,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2021-07-13 19:39:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-07-13 19:39:19,345 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-07-13 19:39:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:19,345 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-07-13 19:39:19,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-07-13 19:39:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:19,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:19,345 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:19,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-07-13 19:39:19,569 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash -95835174, now seen corresponding path program 89 times [2021-07-13 19:39:19,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:19,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902612916] [2021-07-13 19:39:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:19,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:19,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902612916] [2021-07-13 19:39:19,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902612916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:19,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834688766] [2021-07-13 19:39:19,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:19,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:19,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:19,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834688766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:19,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:19,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:19,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114951953] [2021-07-13 19:39:19,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:19,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:19,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:19,803 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:19,858 INFO L93 Difference]: Finished difference Result 120 states and 240 transitions. [2021-07-13 19:39:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:19,859 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:39:19,859 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:39:19,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:39:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-07-13 19:39:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-07-13 19:39:19,861 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-07-13 19:39:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:19,862 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-07-13 19:39:19,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-07-13 19:39:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:19,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:19,862 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:20,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-07-13 19:39:20,065 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1334958297, now seen corresponding path program 90 times [2021-07-13 19:39:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:20,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762545688] [2021-07-13 19:39:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:20,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762545688] [2021-07-13 19:39:20,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762545688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058110227] [2021-07-13 19:39:20,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:39:20,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:20,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:20,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:20,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058110227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:20,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:20,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150206363] [2021-07-13 19:39:20,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:20,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:20,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:20,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:20,367 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:20,510 INFO L93 Difference]: Finished difference Result 139 states and 277 transitions. [2021-07-13 19:39:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:20,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:20,511 INFO L225 Difference]: With dead ends: 139 [2021-07-13 19:39:20,511 INFO L226 Difference]: Without dead ends: 139 [2021-07-13 19:39:20,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-13 19:39:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 97. [2021-07-13 19:39:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.15625) internal successors, (207), 96 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 207 transitions. [2021-07-13 19:39:20,516 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 207 transitions. Word has length 17 [2021-07-13 19:39:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:20,516 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 207 transitions. [2021-07-13 19:39:20,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 207 transitions. [2021-07-13 19:39:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:20,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:20,516 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:20,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1236,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:20,740 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash -685375689, now seen corresponding path program 91 times [2021-07-13 19:39:20,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:20,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656345415] [2021-07-13 19:39:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:20,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656345415] [2021-07-13 19:39:20,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656345415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173265674] [2021-07-13 19:39:20,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173265674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:20,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:39:20,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877870783] [2021-07-13 19:39:20,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:39:20,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:39:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:20,992 INFO L87 Difference]: Start difference. First operand 97 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:21,120 INFO L93 Difference]: Finished difference Result 111 states and 230 transitions. [2021-07-13 19:39:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:21,121 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:39:21,121 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:39:21,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:39:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2021-07-13 19:39:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-07-13 19:39:21,123 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 17 [2021-07-13 19:39:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:21,123 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-07-13 19:39:21,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-07-13 19:39:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:21,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:21,123 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:21,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:21,337 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash -999973674, now seen corresponding path program 92 times [2021-07-13 19:39:21,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:21,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929313179] [2021-07-13 19:39:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:21,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:21,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929313179] [2021-07-13 19:39:21,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929313179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:21,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566748972] [2021-07-13 19:39:21,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:39:21,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:21,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:21,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:21,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:21,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566748972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:21,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:21,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:21,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492948552] [2021-07-13 19:39:21,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:21,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:21,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:21,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:21,622 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:21,815 INFO L93 Difference]: Finished difference Result 105 states and 216 transitions. [2021-07-13 19:39:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:21,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:21,816 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:39:21,816 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:39:21,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:21,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:39:21,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2021-07-13 19:39:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-07-13 19:39:21,818 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-07-13 19:39:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:21,818 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-07-13 19:39:21,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-07-13 19:39:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:21,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:21,819 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:22,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-07-13 19:39:22,038 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:22,038 INFO L82 PathProgramCache]: Analyzing trace with hash -328009912, now seen corresponding path program 93 times [2021-07-13 19:39:22,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:22,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924048406] [2021-07-13 19:39:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924048406] [2021-07-13 19:39:22,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924048406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38252025] [2021-07-13 19:39:22,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:22,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:22,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38252025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:22,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:22,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361632803] [2021-07-13 19:39:22,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:22,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:22,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:22,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:22,242 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:22,325 INFO L93 Difference]: Finished difference Result 110 states and 229 transitions. [2021-07-13 19:39:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:22,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:22,325 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:39:22,325 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:39:22,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:39:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2021-07-13 19:39:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-07-13 19:39:22,329 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-07-13 19:39:22,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:22,329 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-07-13 19:39:22,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-07-13 19:39:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:22,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:22,329 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:22,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-07-13 19:39:22,554 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1423896693, now seen corresponding path program 94 times [2021-07-13 19:39:22,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:22,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226574144] [2021-07-13 19:39:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:22,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226574144] [2021-07-13 19:39:22,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226574144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440066301] [2021-07-13 19:39:22,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:22,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:22,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:22,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:22,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440066301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:22,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:22,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530662335] [2021-07-13 19:39:22,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:22,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:22,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:22,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:22,808 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:22,888 INFO L93 Difference]: Finished difference Result 105 states and 215 transitions. [2021-07-13 19:39:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:22,889 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:39:22,889 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:39:22,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:22,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:39:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-07-13 19:39:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-07-13 19:39:22,891 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-07-13 19:39:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:22,891 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-07-13 19:39:22,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-07-13 19:39:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:22,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:22,892 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:23,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-07-13 19:39:23,113 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:23,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1491121942, now seen corresponding path program 95 times [2021-07-13 19:39:23,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:23,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424528060] [2021-07-13 19:39:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:23,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:23,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424528060] [2021-07-13 19:39:23,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424528060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:23,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61095531] [2021-07-13 19:39:23,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:23,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:23,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:23,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:23,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:23,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61095531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:23,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:23,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:23,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019704675] [2021-07-13 19:39:23,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:23,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:23,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:23,389 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:23,569 INFO L93 Difference]: Finished difference Result 123 states and 255 transitions. [2021-07-13 19:39:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:23,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:23,570 INFO L225 Difference]: With dead ends: 123 [2021-07-13 19:39:23,570 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:39:23,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:39:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-07-13 19:39:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-07-13 19:39:23,572 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-07-13 19:39:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:23,572 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-07-13 19:39:23,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-07-13 19:39:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:23,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:23,573 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:23,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:23,789 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2080662457, now seen corresponding path program 96 times [2021-07-13 19:39:23,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:23,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290811750] [2021-07-13 19:39:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:23,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:23,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290811750] [2021-07-13 19:39:23,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290811750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:23,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188979173] [2021-07-13 19:39:23,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:23,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:24,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188979173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:24,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:24,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:24,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971312198] [2021-07-13 19:39:24,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:24,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:24,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:24,001 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:24,081 INFO L93 Difference]: Finished difference Result 120 states and 240 transitions. [2021-07-13 19:39:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:24,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:24,081 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:39:24,081 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 19:39:24,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 19:39:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2021-07-13 19:39:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 213 transitions. [2021-07-13 19:39:24,083 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 213 transitions. Word has length 17 [2021-07-13 19:39:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:24,083 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 213 transitions. [2021-07-13 19:39:24,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 213 transitions. [2021-07-13 19:39:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:24,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:24,083 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:24,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1264,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:24,284 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:24,284 INFO L82 PathProgramCache]: Analyzing trace with hash -558810360, now seen corresponding path program 97 times [2021-07-13 19:39:24,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:24,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839554707] [2021-07-13 19:39:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:24,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:24,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839554707] [2021-07-13 19:39:24,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839554707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:24,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731501831] [2021-07-13 19:39:24,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:24,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:24,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:24,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731501831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:24,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:24,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:24,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106912409] [2021-07-13 19:39:24,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:24,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:24,511 INFO L87 Difference]: Start difference. First operand 101 states and 213 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:24,727 INFO L93 Difference]: Finished difference Result 133 states and 273 transitions. [2021-07-13 19:39:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:24,728 INFO L225 Difference]: With dead ends: 133 [2021-07-13 19:39:24,728 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:39:24,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:39:24,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:39:24,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2021-07-13 19:39:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 212 transitions. [2021-07-13 19:39:24,730 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 212 transitions. Word has length 17 [2021-07-13 19:39:24,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:24,730 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 212 transitions. [2021-07-13 19:39:24,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,730 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 212 transitions. [2021-07-13 19:39:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:24,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:24,730 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:24,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1270 [2021-07-13 19:39:24,941 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1686206453, now seen corresponding path program 98 times [2021-07-13 19:39:24,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:24,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498222526] [2021-07-13 19:39:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:25,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498222526] [2021-07-13 19:39:25,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498222526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635499055] [2021-07-13 19:39:25,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:25,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:25,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:25,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:25,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635499055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:25,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:25,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923080973] [2021-07-13 19:39:25,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:25,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:25,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:25,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:25,149 INFO L87 Difference]: Start difference. First operand 101 states and 212 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:25,214 INFO L93 Difference]: Finished difference Result 103 states and 215 transitions. [2021-07-13 19:39:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:25,214 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:39:25,214 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:39:25,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:25,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:39:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-07-13 19:39:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-07-13 19:39:25,216 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 17 [2021-07-13 19:39:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:25,216 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-07-13 19:39:25,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-07-13 19:39:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:25,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:25,217 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:25,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1277 [2021-07-13 19:39:25,433 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash 59238245, now seen corresponding path program 99 times [2021-07-13 19:39:25,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:25,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050829755] [2021-07-13 19:39:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:25,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050829755] [2021-07-13 19:39:25,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050829755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139335142] [2021-07-13 19:39:25,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:25,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:25,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139335142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:25,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:25,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760012813] [2021-07-13 19:39:25,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:25,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:25,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:25,652 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:25,734 INFO L93 Difference]: Finished difference Result 103 states and 210 transitions. [2021-07-13 19:39:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:25,735 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:39:25,735 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:39:25,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:39:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-07-13 19:39:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 194 transitions. [2021-07-13 19:39:25,741 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 194 transitions. Word has length 17 [2021-07-13 19:39:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:25,741 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 194 transitions. [2021-07-13 19:39:25,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 194 transitions. [2021-07-13 19:39:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:25,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:25,741 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:25,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:25,967 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:25,967 INFO L82 PathProgramCache]: Analyzing trace with hash -7987004, now seen corresponding path program 100 times [2021-07-13 19:39:25,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:25,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703386738] [2021-07-13 19:39:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:26,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703386738] [2021-07-13 19:39:26,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703386738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301824279] [2021-07-13 19:39:26,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:39:26,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:26,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:26,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:26,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301824279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:26,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:26,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414092810] [2021-07-13 19:39:26,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:26,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:26,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:26,192 INFO L87 Difference]: Start difference. First operand 93 states and 194 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:26,297 INFO L93 Difference]: Finished difference Result 105 states and 218 transitions. [2021-07-13 19:39:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:26,298 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:39:26,298 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:39:26,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:39:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2021-07-13 19:39:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-07-13 19:39:26,299 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 17 [2021-07-13 19:39:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:26,299 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-07-13 19:39:26,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-07-13 19:39:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:26,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:26,300 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:26,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1288 [2021-07-13 19:39:26,513 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash -597527519, now seen corresponding path program 101 times [2021-07-13 19:39:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:26,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824606944] [2021-07-13 19:39:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:26,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824606944] [2021-07-13 19:39:26,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824606944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114288422] [2021-07-13 19:39:26,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:26,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:26,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114288422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:26,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:26,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475497703] [2021-07-13 19:39:26,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:26,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:26,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:26,701 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:26,765 INFO L93 Difference]: Finished difference Result 118 states and 235 transitions. [2021-07-13 19:39:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:26,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:26,766 INFO L225 Difference]: With dead ends: 118 [2021-07-13 19:39:26,766 INFO L226 Difference]: Without dead ends: 115 [2021-07-13 19:39:26,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-13 19:39:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2021-07-13 19:39:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.122448979591837) internal successors, (208), 98 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 208 transitions. [2021-07-13 19:39:26,768 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 208 transitions. Word has length 17 [2021-07-13 19:39:26,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:26,768 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 208 transitions. [2021-07-13 19:39:26,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,768 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 208 transitions. [2021-07-13 19:39:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:26,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:26,769 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:26,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:26,985 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash 924324578, now seen corresponding path program 102 times [2021-07-13 19:39:26,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:26,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371289971] [2021-07-13 19:39:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371289971] [2021-07-13 19:39:27,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371289971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357913175] [2021-07-13 19:39:27,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:39:27,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:27,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:27,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357913175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:27,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:27,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316876045] [2021-07-13 19:39:27,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:27,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:27,223 INFO L87 Difference]: Start difference. First operand 99 states and 208 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:27,382 INFO L93 Difference]: Finished difference Result 120 states and 247 transitions. [2021-07-13 19:39:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:27,383 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:39:27,383 INFO L226 Difference]: Without dead ends: 118 [2021-07-13 19:39:27,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-13 19:39:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-07-13 19:39:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 98 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 207 transitions. [2021-07-13 19:39:27,384 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 207 transitions. Word has length 17 [2021-07-13 19:39:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:27,384 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 207 transitions. [2021-07-13 19:39:27,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 207 transitions. [2021-07-13 19:39:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:27,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:27,385 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:27,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-07-13 19:39:27,608 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash -203071515, now seen corresponding path program 103 times [2021-07-13 19:39:27,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:27,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640784005] [2021-07-13 19:39:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:27,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640784005] [2021-07-13 19:39:27,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640784005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173836083] [2021-07-13 19:39:27,694 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 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 19:39:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173836083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:27,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:27,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595356141] [2021-07-13 19:39:27,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:27,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:27,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:27,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:27,822 INFO L87 Difference]: Start difference. First operand 99 states and 207 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:27,879 INFO L93 Difference]: Finished difference Result 101 states and 210 transitions. [2021-07-13 19:39:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:27,879 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:39:27,879 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:39:27,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:39:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2021-07-13 19:39:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 194 transitions. [2021-07-13 19:39:27,882 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 194 transitions. Word has length 17 [2021-07-13 19:39:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:27,882 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 194 transitions. [2021-07-13 19:39:27,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 194 transitions. [2021-07-13 19:39:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:27,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:27,882 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:28,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-07-13 19:39:28,089 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash 417978312, now seen corresponding path program 104 times [2021-07-13 19:39:28,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:28,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348044585] [2021-07-13 19:39:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:28,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348044585] [2021-07-13 19:39:28,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348044585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531734603] [2021-07-13 19:39:28,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:28,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:28,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:28,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:28,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531734603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:28,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:28,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378578789] [2021-07-13 19:39:28,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:28,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:28,294 INFO L87 Difference]: Start difference. First operand 93 states and 194 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:28,367 INFO L93 Difference]: Finished difference Result 115 states and 229 transitions. [2021-07-13 19:39:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:28,368 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:39:28,368 INFO L226 Difference]: Without dead ends: 115 [2021-07-13 19:39:28,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-13 19:39:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-07-13 19:39:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.10989010989011) internal successors, (192), 91 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 192 transitions. [2021-07-13 19:39:28,369 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 192 transitions. Word has length 17 [2021-07-13 19:39:28,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:28,369 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 192 transitions. [2021-07-13 19:39:28,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 192 transitions. [2021-07-13 19:39:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:28,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:28,370 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:28,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1306,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:28,570 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:28,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:28,571 INFO L82 PathProgramCache]: Analyzing trace with hash -171562203, now seen corresponding path program 105 times [2021-07-13 19:39:28,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:28,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717997443] [2021-07-13 19:39:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:28,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717997443] [2021-07-13 19:39:28,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717997443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044452250] [2021-07-13 19:39:28,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:28,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:28,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:28,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044452250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:28,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:28,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348535623] [2021-07-13 19:39:28,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:28,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:28,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:28,823 INFO L87 Difference]: Start difference. First operand 92 states and 192 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:28,940 INFO L93 Difference]: Finished difference Result 103 states and 213 transitions. [2021-07-13 19:39:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:28,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:28,941 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:39:28,941 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:39:28,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:39:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2021-07-13 19:39:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.10989010989011) internal successors, (192), 91 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 192 transitions. [2021-07-13 19:39:28,945 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 192 transitions. Word has length 17 [2021-07-13 19:39:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:28,945 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 192 transitions. [2021-07-13 19:39:28,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 192 transitions. [2021-07-13 19:39:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:28,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:28,945 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:29,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-07-13 19:39:29,165 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:29,165 INFO L82 PathProgramCache]: Analyzing trace with hash -486160188, now seen corresponding path program 106 times [2021-07-13 19:39:29,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:29,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392231807] [2021-07-13 19:39:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:29,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:29,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392231807] [2021-07-13 19:39:29,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392231807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:29,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196389760] [2021-07-13 19:39:29,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:29,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:29,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:29,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:29,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196389760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:29,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:29,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:29,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394774393] [2021-07-13 19:39:29,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:29,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:29,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:29,395 INFO L87 Difference]: Start difference. First operand 92 states and 192 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:29,463 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-07-13 19:39:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:29,464 INFO L225 Difference]: With dead ends: 99 [2021-07-13 19:39:29,464 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:39:29,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:39:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-07-13 19:39:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.098901098901099) internal successors, (191), 91 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 191 transitions. [2021-07-13 19:39:29,465 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 191 transitions. Word has length 17 [2021-07-13 19:39:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:29,465 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 191 transitions. [2021-07-13 19:39:29,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 191 transitions. [2021-07-13 19:39:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:29,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:29,466 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:29,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1313,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:29,666 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1208218933, now seen corresponding path program 107 times [2021-07-13 19:39:29,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:29,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013330863] [2021-07-13 19:39:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:29,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:29,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013330863] [2021-07-13 19:39:29,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013330863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:29,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158152504] [2021-07-13 19:39:29,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:29,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:29,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:29,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:29,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158152504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:29,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:29,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:29,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559395604] [2021-07-13 19:39:29,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:29,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:29,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:29,967 INFO L87 Difference]: Start difference. First operand 92 states and 191 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:30,168 INFO L93 Difference]: Finished difference Result 101 states and 204 transitions. [2021-07-13 19:39:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:30,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:30,169 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:39:30,169 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:39:30,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:30,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:39:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-07-13 19:39:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-07-13 19:39:30,170 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-07-13 19:39:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:30,171 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-07-13 19:39:30,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-07-13 19:39:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:30,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:30,171 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:30,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1318 [2021-07-13 19:39:30,373 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1275444182, now seen corresponding path program 108 times [2021-07-13 19:39:30,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:30,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385167837] [2021-07-13 19:39:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:30,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:30,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385167837] [2021-07-13 19:39:30,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385167837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:30,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250209728] [2021-07-13 19:39:30,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:30,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:30,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:30,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:30,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:30,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250209728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:30,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:30,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:30,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44212291] [2021-07-13 19:39:30,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:30,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:30,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:30,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:30,636 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:30,750 INFO L93 Difference]: Finished difference Result 103 states and 212 transitions. [2021-07-13 19:39:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:30,750 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:39:30,750 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:39:30,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:39:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2021-07-13 19:39:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-07-13 19:39:30,752 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-07-13 19:39:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:30,752 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-07-13 19:39:30,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-07-13 19:39:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:30,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:30,752 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:30,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1329,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:30,953 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:30,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2079910332, now seen corresponding path program 109 times [2021-07-13 19:39:30,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:30,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592298341] [2021-07-13 19:39:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:31,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592298341] [2021-07-13 19:39:31,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592298341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454970207] [2021-07-13 19:39:31,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:31,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:31,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454970207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:31,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:31,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520233491] [2021-07-13 19:39:31,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:31,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:31,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:31,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:31,185 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:31,273 INFO L93 Difference]: Finished difference Result 112 states and 231 transitions. [2021-07-13 19:39:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:31,273 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:31,274 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:39:31,274 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:39:31,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:39:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-07-13 19:39:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-07-13 19:39:31,275 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-07-13 19:39:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:31,275 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-07-13 19:39:31,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-07-13 19:39:31,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:31,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:31,276 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:31,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1332 [2021-07-13 19:39:31,489 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1470528693, now seen corresponding path program 110 times [2021-07-13 19:39:31,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:31,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946157788] [2021-07-13 19:39:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946157788] [2021-07-13 19:39:31,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946157788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396593475] [2021-07-13 19:39:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:31,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:31,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:31,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:31,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:39:31,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,811 INFO L628 ElimStorePlain]: treesize reduction 1, result has 92.3 percent of original size [2021-07-13 19:39:31,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:31,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 19:39:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396593475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:31,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:31,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136170079] [2021-07-13 19:39:31,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:31,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:31,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:31,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:31,838 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:31,976 INFO L93 Difference]: Finished difference Result 98 states and 202 transitions. [2021-07-13 19:39:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:31,977 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:39:31,977 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:39:31,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:39:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2021-07-13 19:39:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 186 transitions. [2021-07-13 19:39:31,978 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 186 transitions. Word has length 17 [2021-07-13 19:39:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:31,979 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 186 transitions. [2021-07-13 19:39:31,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 186 transitions. [2021-07-13 19:39:31,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:31,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:31,979 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:32,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1339,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:32,189 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1923636333, now seen corresponding path program 111 times [2021-07-13 19:39:32,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:32,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118403026] [2021-07-13 19:39:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:32,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:32,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118403026] [2021-07-13 19:39:32,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118403026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:32,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963898049] [2021-07-13 19:39:32,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:32,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:32,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:32,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:32,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:32,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963898049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:32,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:32,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:32,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456860743] [2021-07-13 19:39:32,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:32,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:32,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:32,409 INFO L87 Difference]: Start difference. First operand 90 states and 186 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:32,548 INFO L93 Difference]: Finished difference Result 120 states and 237 transitions. [2021-07-13 19:39:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:32,549 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:39:32,549 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 19:39:32,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 19:39:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2021-07-13 19:39:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-07-13 19:39:32,550 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-07-13 19:39:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:32,551 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-07-13 19:39:32,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-07-13 19:39:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:32,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:32,551 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:32,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:32,751 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:32,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:32,752 INFO L82 PathProgramCache]: Analyzing trace with hash -849478866, now seen corresponding path program 112 times [2021-07-13 19:39:32,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:32,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330076950] [2021-07-13 19:39:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:32,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:32,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330076950] [2021-07-13 19:39:32,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330076950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:32,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830564795] [2021-07-13 19:39:32,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:32,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:32,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:32,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:32,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:32,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830564795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:32,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:32,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:32,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980063366] [2021-07-13 19:39:32,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:32,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:32,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:32,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:32,987 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:33,050 INFO L93 Difference]: Finished difference Result 119 states and 239 transitions. [2021-07-13 19:39:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:33,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:33,052 INFO L225 Difference]: With dead ends: 119 [2021-07-13 19:39:33,053 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:39:33,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:39:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2021-07-13 19:39:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-07-13 19:39:33,054 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-07-13 19:39:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:33,055 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-07-13 19:39:33,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-07-13 19:39:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:33,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:33,055 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:33,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1367,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:33,265 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:33,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:33,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1976874959, now seen corresponding path program 113 times [2021-07-13 19:39:33,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:33,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729922722] [2021-07-13 19:39:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:33,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729922722] [2021-07-13 19:39:33,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729922722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157802830] [2021-07-13 19:39:33,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:33,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:33,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:33,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157802830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:33,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:33,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798742501] [2021-07-13 19:39:33,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:33,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:33,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:33,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:33,493 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:33,658 INFO L93 Difference]: Finished difference Result 120 states and 240 transitions. [2021-07-13 19:39:33,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:33,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:33,658 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:39:33,658 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:39:33,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:39:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2021-07-13 19:39:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-07-13 19:39:33,660 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-07-13 19:39:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:33,660 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-07-13 19:39:33,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-07-13 19:39:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:33,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:33,660 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:33,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:33,881 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:33,881 INFO L82 PathProgramCache]: Analyzing trace with hash 392553394, now seen corresponding path program 114 times [2021-07-13 19:39:33,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:33,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904355824] [2021-07-13 19:39:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904355824] [2021-07-13 19:39:33,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904355824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785180631] [2021-07-13 19:39:33,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:34,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:34,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:34,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:34,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785180631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:34,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:34,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:34,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870930773] [2021-07-13 19:39:34,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:34,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:34,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:34,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:34,096 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:34,199 INFO L93 Difference]: Finished difference Result 121 states and 240 transitions. [2021-07-13 19:39:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:34,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:34,200 INFO L225 Difference]: With dead ends: 121 [2021-07-13 19:39:34,200 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:39:34,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:39:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2021-07-13 19:39:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-07-13 19:39:34,201 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-07-13 19:39:34,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:34,201 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-07-13 19:39:34,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-07-13 19:39:34,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:34,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:34,202 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:34,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1377,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:34,402 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:34,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:34,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1439019381, now seen corresponding path program 115 times [2021-07-13 19:39:34,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:34,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434670079] [2021-07-13 19:39:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:34,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:34,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434670079] [2021-07-13 19:39:34,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434670079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:34,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678050582] [2021-07-13 19:39:34,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:34,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:34,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:34,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678050582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:34,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:34,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:34,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671438777] [2021-07-13 19:39:34,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:34,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:34,630 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:34,749 INFO L93 Difference]: Finished difference Result 105 states and 216 transitions. [2021-07-13 19:39:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:34,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:34,750 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:39:34,750 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:39:34,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:39:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2021-07-13 19:39:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-07-13 19:39:34,751 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-07-13 19:39:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:34,751 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-07-13 19:39:34,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-07-13 19:39:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:34,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:34,752 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:34,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1381,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:34,967 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:34,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:34,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1753617366, now seen corresponding path program 116 times [2021-07-13 19:39:34,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:34,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330306981] [2021-07-13 19:39:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:35,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330306981] [2021-07-13 19:39:35,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330306981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616715856] [2021-07-13 19:39:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:35,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:35,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:35,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:35,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616715856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:35,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:35,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:35,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823482531] [2021-07-13 19:39:35,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:35,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:35,168 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:35,246 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-07-13 19:39:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:35,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:35,247 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:39:35,247 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:39:35,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:39:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-07-13 19:39:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 184 transitions. [2021-07-13 19:39:35,249 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 184 transitions. Word has length 17 [2021-07-13 19:39:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:35,249 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 184 transitions. [2021-07-13 19:39:35,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,249 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 184 transitions. [2021-07-13 19:39:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:35,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:35,250 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:35,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1383 [2021-07-13 19:39:35,465 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:35,465 INFO L82 PathProgramCache]: Analyzing trace with hash -888196025, now seen corresponding path program 117 times [2021-07-13 19:39:35,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:35,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343757873] [2021-07-13 19:39:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:35,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:35,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343757873] [2021-07-13 19:39:35,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343757873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:35,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304696357] [2021-07-13 19:39:35,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:35,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:35,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:35,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:35,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:35,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304696357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:35,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:35,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:35,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001394491] [2021-07-13 19:39:35,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:35,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:35,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:35,676 INFO L87 Difference]: Start difference. First operand 89 states and 184 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:35,751 INFO L93 Difference]: Finished difference Result 130 states and 257 transitions. [2021-07-13 19:39:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:35,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:35,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:35,752 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:39:35,752 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:39:35,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:39:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-07-13 19:39:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-07-13 19:39:35,753 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-07-13 19:39:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:35,754 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-07-13 19:39:35,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:35,754 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-07-13 19:39:35,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:35,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:35,754 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:35,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-07-13 19:39:35,954 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash 633656072, now seen corresponding path program 118 times [2021-07-13 19:39:35,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:35,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960797230] [2021-07-13 19:39:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:36,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960797230] [2021-07-13 19:39:36,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960797230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353194807] [2021-07-13 19:39:36,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:36,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:36,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:36,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:36,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:39:36,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,237 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-07-13 19:39:36,237 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:39:36,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:36,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-07-13 19:39:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353194807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:36,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:36,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140781075] [2021-07-13 19:39:36,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:36,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:36,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:36,260 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:36,327 INFO L93 Difference]: Finished difference Result 122 states and 246 transitions. [2021-07-13 19:39:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:36,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:36,327 INFO L225 Difference]: With dead ends: 122 [2021-07-13 19:39:36,327 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:39:36,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:39:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2021-07-13 19:39:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-07-13 19:39:36,329 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-07-13 19:39:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:36,329 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-07-13 19:39:36,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-07-13 19:39:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:36,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:36,329 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:36,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1392,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:36,533 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash -493740021, now seen corresponding path program 119 times [2021-07-13 19:39:36,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:36,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113961789] [2021-07-13 19:39:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:36,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113961789] [2021-07-13 19:39:36,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113961789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760123752] [2021-07-13 19:39:36,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:36,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:36,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:36,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760123752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:36,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:36,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970933382] [2021-07-13 19:39:36,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:36,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:36,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:36,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:36,750 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:36,911 INFO L93 Difference]: Finished difference Result 133 states and 266 transitions. [2021-07-13 19:39:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:36,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:36,912 INFO L225 Difference]: With dead ends: 133 [2021-07-13 19:39:36,912 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:39:36,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:39:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-07-13 19:39:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-07-13 19:39:36,914 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-07-13 19:39:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:36,914 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-07-13 19:39:36,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-07-13 19:39:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:36,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:36,915 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:37,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1406 [2021-07-13 19:39:37,133 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1875688332, now seen corresponding path program 120 times [2021-07-13 19:39:37,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:37,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088891986] [2021-07-13 19:39:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:37,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:37,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088891986] [2021-07-13 19:39:37,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088891986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:37,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723128581] [2021-07-13 19:39:37,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:37,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:37,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:37,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:37,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:37,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:39:37,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:37,437 INFO L628 ElimStorePlain]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 19:39:37,437 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-13 19:39:37,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:37,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:12 [2021-07-13 19:39:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:37,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723128581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:37,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:37,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:37,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637326451] [2021-07-13 19:39:37,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:37,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:37,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:37,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:37,461 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:37,532 INFO L93 Difference]: Finished difference Result 124 states and 247 transitions. [2021-07-13 19:39:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:37,532 INFO L225 Difference]: With dead ends: 124 [2021-07-13 19:39:37,532 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:39:37,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:39:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2021-07-13 19:39:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-07-13 19:39:37,534 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-07-13 19:39:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:37,534 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-07-13 19:39:37,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-07-13 19:39:37,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:37,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:37,535 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:37,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1411,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:37,737 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:37,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:37,737 INFO L82 PathProgramCache]: Analyzing trace with hash 44115557, now seen corresponding path program 121 times [2021-07-13 19:39:37,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:37,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508169990] [2021-07-13 19:39:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:37,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508169990] [2021-07-13 19:39:37,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508169990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858321101] [2021-07-13 19:39:37,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:37,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:38,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858321101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:38,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:38,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:39:38,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296340238] [2021-07-13 19:39:38,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:39:38,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:38,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:39:38,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:38,045 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:38,130 INFO L93 Difference]: Finished difference Result 117 states and 241 transitions. [2021-07-13 19:39:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:38,131 INFO L225 Difference]: With dead ends: 117 [2021-07-13 19:39:38,131 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 19:39:38,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:38,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 19:39:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2021-07-13 19:39:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-07-13 19:39:38,132 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-07-13 19:39:38,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:38,132 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-07-13 19:39:38,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-07-13 19:39:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:38,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:38,132 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:38,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-07-13 19:39:38,333 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash -270482428, now seen corresponding path program 122 times [2021-07-13 19:39:38,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:38,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187799068] [2021-07-13 19:39:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:38,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:38,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187799068] [2021-07-13 19:39:38,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187799068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:38,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525029503] [2021-07-13 19:39:38,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:38,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:38,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:38,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:38,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525029503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:38,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:38,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:38,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442865893] [2021-07-13 19:39:38,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:38,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:38,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:38,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:38,748 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:39,018 INFO L93 Difference]: Finished difference Result 108 states and 221 transitions. [2021-07-13 19:39:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:39,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:39,019 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:39:39,019 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:39:39,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:39:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:39:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-07-13 19:39:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-07-13 19:39:39,020 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-07-13 19:39:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:39,020 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-07-13 19:39:39,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-07-13 19:39:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:39,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:39,021 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:39,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:39,221 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash -462230709, now seen corresponding path program 123 times [2021-07-13 19:39:39,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:39,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303308831] [2021-07-13 19:39:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:39,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303308831] [2021-07-13 19:39:39,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303308831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268778345] [2021-07-13 19:39:39,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:39,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:39,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:39,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268778345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:39,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:39:39,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361786562] [2021-07-13 19:39:39,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:39:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:39:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:39,373 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:39,423 INFO L93 Difference]: Finished difference Result 110 states and 226 transitions. [2021-07-13 19:39:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:39,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:39,423 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:39:39,423 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:39:39,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:39,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:39:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2021-07-13 19:39:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 190 transitions. [2021-07-13 19:39:39,425 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 190 transitions. Word has length 17 [2021-07-13 19:39:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:39,425 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 190 transitions. [2021-07-13 19:39:39,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 190 transitions. [2021-07-13 19:39:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:39,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:39,425 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:39,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-07-13 19:39:39,641 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1917700748, now seen corresponding path program 124 times [2021-07-13 19:39:39,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:39,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261123340] [2021-07-13 19:39:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:39,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261123340] [2021-07-13 19:39:39,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261123340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312878277] [2021-07-13 19:39:39,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:39,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:39,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:39,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312878277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:39,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:39,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909360707] [2021-07-13 19:39:39,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:39,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:39,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:39,804 INFO L87 Difference]: Start difference. First operand 91 states and 190 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:39,877 INFO L93 Difference]: Finished difference Result 100 states and 203 transitions. [2021-07-13 19:39:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:39,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:39,878 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:39:39,878 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:39:39,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:39:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-07-13 19:39:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-07-13 19:39:39,879 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-07-13 19:39:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:39,879 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-07-13 19:39:39,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-07-13 19:39:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:39,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:39,879 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:40,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-07-13 19:39:40,093 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1589612134, now seen corresponding path program 125 times [2021-07-13 19:39:40,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:40,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186646499] [2021-07-13 19:39:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:40,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186646499] [2021-07-13 19:39:40,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186646499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021437044] [2021-07-13 19:39:40,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:40,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021437044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:40,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:40,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146634396] [2021-07-13 19:39:40,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:40,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:40,267 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:40,329 INFO L93 Difference]: Finished difference Result 103 states and 213 transitions. [2021-07-13 19:39:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:40,330 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:39:40,330 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:39:40,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:39:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2021-07-13 19:39:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-07-13 19:39:40,331 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-07-13 19:39:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:40,331 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-07-13 19:39:40,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-07-13 19:39:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:40,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:40,331 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:40,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1445 [2021-07-13 19:39:40,545 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1542243132, now seen corresponding path program 126 times [2021-07-13 19:39:40,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:40,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636012197] [2021-07-13 19:39:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:40,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636012197] [2021-07-13 19:39:40,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636012197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390656790] [2021-07-13 19:39:40,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:40,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:40,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:40,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390656790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:40,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:39:40,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633463239] [2021-07-13 19:39:40,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:39:40,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:40,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:39:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:40,732 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:40,799 INFO L93 Difference]: Finished difference Result 115 states and 237 transitions. [2021-07-13 19:39:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:40,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:40,800 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:39:40,800 INFO L226 Difference]: Without dead ends: 115 [2021-07-13 19:39:40,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-13 19:39:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2021-07-13 19:39:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-07-13 19:39:40,802 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-07-13 19:39:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:40,802 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-07-13 19:39:40,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-07-13 19:39:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:40,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:40,802 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:41,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1447 [2021-07-13 19:39:41,003 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:41,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1820412582, now seen corresponding path program 127 times [2021-07-13 19:39:41,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:41,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556263142] [2021-07-13 19:39:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:41,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:41,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556263142] [2021-07-13 19:39:41,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556263142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:41,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889049083] [2021-07-13 19:39:41,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:41,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:41,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:39:41,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:41,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:41,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:41,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:12 [2021-07-13 19:39:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:41,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889049083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:41,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:41,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:41,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034597958] [2021-07-13 19:39:41,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:41,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:41,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:41,242 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:41,310 INFO L93 Difference]: Finished difference Result 112 states and 231 transitions. [2021-07-13 19:39:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:41,311 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:39:41,311 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:39:41,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:39:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-07-13 19:39:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.098901098901099) internal successors, (191), 91 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 191 transitions. [2021-07-13 19:39:41,312 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 191 transitions. Word has length 17 [2021-07-13 19:39:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:41,312 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 191 transitions. [2021-07-13 19:39:41,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 191 transitions. [2021-07-13 19:39:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:41,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:41,312 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:41,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:41,513 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1347158621, now seen corresponding path program 128 times [2021-07-13 19:39:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:41,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420669678] [2021-07-13 19:39:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:41,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420669678] [2021-07-13 19:39:41,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420669678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23592040] [2021-07-13 19:39:41,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:41,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:41,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:41,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:41,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:41,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23592040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:41,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:41,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:41,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279924208] [2021-07-13 19:39:41,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:41,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:41,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:41,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:41,744 INFO L87 Difference]: Start difference. First operand 92 states and 191 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:41,810 INFO L93 Difference]: Finished difference Result 95 states and 197 transitions. [2021-07-13 19:39:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:41,810 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:41,811 INFO L225 Difference]: With dead ends: 95 [2021-07-13 19:39:41,811 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:39:41,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:41,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:39:41,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2021-07-13 19:39:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.102272727272727) internal successors, (185), 88 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 185 transitions. [2021-07-13 19:39:41,812 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 185 transitions. Word has length 17 [2021-07-13 19:39:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:41,812 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 185 transitions. [2021-07-13 19:39:41,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 185 transitions. [2021-07-13 19:39:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:41,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:41,812 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:42,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1461,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:42,021 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:42,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1202363977, now seen corresponding path program 129 times [2021-07-13 19:39:42,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:42,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298592769] [2021-07-13 19:39:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:42,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:42,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298592769] [2021-07-13 19:39:42,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298592769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32592317] [2021-07-13 19:39:42,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:42,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:42,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:42,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:42,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:42,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32592317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:42,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:42,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841884409] [2021-07-13 19:39:42,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:42,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:42,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:42,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:42,220 INFO L87 Difference]: Start difference. First operand 89 states and 185 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:42,284 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2021-07-13 19:39:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:42,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:42,284 INFO L225 Difference]: With dead ends: 95 [2021-07-13 19:39:42,284 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:39:42,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:39:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-07-13 19:39:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 184 transitions. [2021-07-13 19:39:42,286 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 184 transitions. Word has length 17 [2021-07-13 19:39:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:42,286 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 184 transitions. [2021-07-13 19:39:42,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 184 transitions. [2021-07-13 19:39:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:42,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:42,286 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:42,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:42,504 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:42,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1269589226, now seen corresponding path program 130 times [2021-07-13 19:39:42,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:42,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377309543] [2021-07-13 19:39:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:42,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:42,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377309543] [2021-07-13 19:39:42,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377309543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351646263] [2021-07-13 19:39:42,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:42,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:42,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:42,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:42,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351646263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:42,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:42,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918060167] [2021-07-13 19:39:42,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:42,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:42,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:42,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:42,704 INFO L87 Difference]: Start difference. First operand 89 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:42,758 INFO L93 Difference]: Finished difference Result 97 states and 200 transitions. [2021-07-13 19:39:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:42,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:42,759 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:39:42,759 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:39:42,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:39:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2021-07-13 19:39:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 184 transitions. [2021-07-13 19:39:42,760 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 184 transitions. Word has length 17 [2021-07-13 19:39:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:42,760 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 184 transitions. [2021-07-13 19:39:42,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 184 transitions. [2021-07-13 19:39:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:42,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:42,761 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:42,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-07-13 19:39:42,965 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash -337277644, now seen corresponding path program 131 times [2021-07-13 19:39:42,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:42,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478940765] [2021-07-13 19:39:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:43,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478940765] [2021-07-13 19:39:43,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478940765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69553661] [2021-07-13 19:39:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:43,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:43,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:43,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69553661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:43,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:43,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024985048] [2021-07-13 19:39:43,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:43,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:43,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:43,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:43,138 INFO L87 Difference]: Start difference. First operand 89 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:43,189 INFO L93 Difference]: Finished difference Result 105 states and 216 transitions. [2021-07-13 19:39:43,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:43,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:43,190 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:39:43,190 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 19:39:43,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 19:39:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2021-07-13 19:39:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 184 transitions. [2021-07-13 19:39:43,191 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 184 transitions. Word has length 17 [2021-07-13 19:39:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:43,191 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 184 transitions. [2021-07-13 19:39:43,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 184 transitions. [2021-07-13 19:39:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:43,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:43,191 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:43,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1477 [2021-07-13 19:39:43,392 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:43,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1093515827, now seen corresponding path program 132 times [2021-07-13 19:39:43,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:43,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510594903] [2021-07-13 19:39:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:43,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510594903] [2021-07-13 19:39:43,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510594903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157946418] [2021-07-13 19:39:43,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:43,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:43,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:43,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157946418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:43,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:43,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400119647] [2021-07-13 19:39:43,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:43,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:43,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:43,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:43,595 INFO L87 Difference]: Start difference. First operand 89 states and 184 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:43,657 INFO L93 Difference]: Finished difference Result 92 states and 188 transitions. [2021-07-13 19:39:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:43,658 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:39:43,658 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:39:43,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:39:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-07-13 19:39:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 84 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 172 transitions. [2021-07-13 19:39:43,659 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 172 transitions. Word has length 17 [2021-07-13 19:39:43,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:43,659 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 172 transitions. [2021-07-13 19:39:43,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 172 transitions. [2021-07-13 19:39:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:43,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:43,659 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:43,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:43,860 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1929491289, now seen corresponding path program 133 times [2021-07-13 19:39:43,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:43,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258712687] [2021-07-13 19:39:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258712687] [2021-07-13 19:39:43,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258712687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625563835] [2021-07-13 19:39:43,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:43,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625563835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:44,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:44,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791393907] [2021-07-13 19:39:44,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:44,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:44,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:44,031 INFO L87 Difference]: Start difference. First operand 85 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:44,102 INFO L93 Difference]: Finished difference Result 112 states and 217 transitions. [2021-07-13 19:39:44,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:44,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:44,103 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:39:44,103 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 19:39:44,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 19:39:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2021-07-13 19:39:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-07-13 19:39:44,104 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-07-13 19:39:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:44,104 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-07-13 19:39:44,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-07-13 19:39:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:44,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:44,104 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:44,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1490 [2021-07-13 19:39:44,327 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:44,327 INFO L82 PathProgramCache]: Analyzing trace with hash -843623910, now seen corresponding path program 134 times [2021-07-13 19:39:44,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:44,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514372326] [2021-07-13 19:39:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:44,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514372326] [2021-07-13 19:39:44,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514372326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133115977] [2021-07-13 19:39:44,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:44,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:44,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:44,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133115977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:44,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:44,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856337143] [2021-07-13 19:39:44,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:44,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:44,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:44,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:44,538 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:44,611 INFO L93 Difference]: Finished difference Result 111 states and 219 transitions. [2021-07-13 19:39:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:44,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:44,612 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:39:44,612 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:39:44,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:39:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2021-07-13 19:39:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-07-13 19:39:44,613 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-07-13 19:39:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:44,613 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-07-13 19:39:44,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-07-13 19:39:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:44,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:44,614 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:44,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1495 [2021-07-13 19:39:44,814 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:44,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1971020003, now seen corresponding path program 135 times [2021-07-13 19:39:44,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:44,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525737415] [2021-07-13 19:39:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:44,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525737415] [2021-07-13 19:39:44,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525737415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272414095] [2021-07-13 19:39:44,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:44,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:44,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:44,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:44,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:45,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:39:45,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:39:45,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:45,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:45,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:45,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:12 [2021-07-13 19:39:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272414095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:45,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:45,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660205525] [2021-07-13 19:39:45,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:45,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:45,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:45,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:45,047 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:45,122 INFO L93 Difference]: Finished difference Result 112 states and 220 transitions. [2021-07-13 19:39:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:45,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:45,123 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:39:45,123 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:39:45,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:39:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-07-13 19:39:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-07-13 19:39:45,124 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-07-13 19:39:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:45,124 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-07-13 19:39:45,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-07-13 19:39:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:45,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:45,124 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:45,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1501 [2021-07-13 19:39:45,325 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash 398408350, now seen corresponding path program 136 times [2021-07-13 19:39:45,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:45,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406789172] [2021-07-13 19:39:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:45,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406789172] [2021-07-13 19:39:45,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406789172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116526124] [2021-07-13 19:39:45,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:45,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:45,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:45,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116526124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:45,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:45,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042013707] [2021-07-13 19:39:45,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:45,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:45,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:45,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:45,516 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:45,573 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-07-13 19:39:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:45,574 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:39:45,574 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:39:45,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:39:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-07-13 19:39:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 187 transitions. [2021-07-13 19:39:45,575 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 187 transitions. Word has length 17 [2021-07-13 19:39:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:45,575 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 187 transitions. [2021-07-13 19:39:45,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 187 transitions. [2021-07-13 19:39:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:45,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:45,575 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:45,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1511 [2021-07-13 19:39:45,776 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:45,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1433164425, now seen corresponding path program 137 times [2021-07-13 19:39:45,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:45,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423575128] [2021-07-13 19:39:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:45,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423575128] [2021-07-13 19:39:45,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423575128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716006311] [2021-07-13 19:39:45,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:45,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:45,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:45,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:45,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716006311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:45,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:39:45,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316490912] [2021-07-13 19:39:45,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:39:45,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:39:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:45,982 INFO L87 Difference]: Start difference. First operand 91 states and 187 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:46,040 INFO L93 Difference]: Finished difference Result 97 states and 196 transitions. [2021-07-13 19:39:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:46,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:46,040 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:39:46,040 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:39:46,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:39:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2021-07-13 19:39:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 175 transitions. [2021-07-13 19:39:46,042 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 175 transitions. Word has length 17 [2021-07-13 19:39:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:46,042 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 175 transitions. [2021-07-13 19:39:46,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 175 transitions. [2021-07-13 19:39:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:46,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:46,042 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:46,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1517,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:46,245 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:46,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:46,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1747762410, now seen corresponding path program 138 times [2021-07-13 19:39:46,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:46,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136886256] [2021-07-13 19:39:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:46,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136886256] [2021-07-13 19:39:46,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136886256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016653336] [2021-07-13 19:39:46,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:46,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:46,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:46,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:46,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016653336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:46,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:46,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736826319] [2021-07-13 19:39:46,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:46,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:46,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:46,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:46,442 INFO L87 Difference]: Start difference. First operand 86 states and 175 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:46,524 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-07-13 19:39:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:46,525 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:39:46,525 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 19:39:46,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 19:39:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-07-13 19:39:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-07-13 19:39:46,526 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-07-13 19:39:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:46,526 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-07-13 19:39:46,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-07-13 19:39:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:46,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:46,526 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:46,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1519,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:46,727 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:46,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1757920892, now seen corresponding path program 139 times [2021-07-13 19:39:46,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:46,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593499721] [2021-07-13 19:39:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:46,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593499721] [2021-07-13 19:39:46,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593499721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871062176] [2021-07-13 19:39:46,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:46,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:46,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871062176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:46,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:39:46,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089947991] [2021-07-13 19:39:46,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:39:46,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:46,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:39:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:46,911 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:46,976 INFO L93 Difference]: Finished difference Result 93 states and 188 transitions. [2021-07-13 19:39:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:46,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:46,977 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:39:46,977 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:39:46,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:39:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-07-13 19:39:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 84 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 172 transitions. [2021-07-13 19:39:46,978 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 172 transitions. Word has length 17 [2021-07-13 19:39:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:46,978 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 172 transitions. [2021-07-13 19:39:46,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 172 transitions. [2021-07-13 19:39:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:46,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:46,979 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:47,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1523 [2021-07-13 19:39:47,179 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:47,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1168380377, now seen corresponding path program 140 times [2021-07-13 19:39:47,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:47,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332064206] [2021-07-13 19:39:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:47,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332064206] [2021-07-13 19:39:47,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332064206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268543301] [2021-07-13 19:39:47,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:47,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:47,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:47,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268543301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:47,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:47,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312699448] [2021-07-13 19:39:47,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:47,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:47,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:47,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:47,435 INFO L87 Difference]: Start difference. First operand 85 states and 172 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:47,590 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-07-13 19:39:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:47,591 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:39:47,591 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:39:47,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:39:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 90. [2021-07-13 19:39:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.067415730337079) internal successors, (184), 89 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 184 transitions. [2021-07-13 19:39:47,592 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 184 transitions. Word has length 17 [2021-07-13 19:39:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:47,592 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 184 transitions. [2021-07-13 19:39:47,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,592 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 184 transitions. [2021-07-13 19:39:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:47,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:47,593 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:47,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1525 [2021-07-13 19:39:47,809 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1604734822, now seen corresponding path program 141 times [2021-07-13 19:39:47,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:47,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127889359] [2021-07-13 19:39:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:47,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127889359] [2021-07-13 19:39:47,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127889359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017432727] [2021-07-13 19:39:47,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:47,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:47,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017432727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:47,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:47,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499887310] [2021-07-13 19:39:47,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:47,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:47,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:47,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:47,988 INFO L87 Difference]: Start difference. First operand 90 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:48,065 INFO L93 Difference]: Finished difference Result 119 states and 234 transitions. [2021-07-13 19:39:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:48,066 INFO L225 Difference]: With dead ends: 119 [2021-07-13 19:39:48,067 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:39:48,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:39:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2021-07-13 19:39:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.067415730337079) internal successors, (184), 89 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 184 transitions. [2021-07-13 19:39:48,068 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 184 transitions. Word has length 17 [2021-07-13 19:39:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:48,068 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 184 transitions. [2021-07-13 19:39:48,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 184 transitions. [2021-07-13 19:39:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:48,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:48,068 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:48,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1531 [2021-07-13 19:39:48,291 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1562836381, now seen corresponding path program 142 times [2021-07-13 19:39:48,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:48,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033203661] [2021-07-13 19:39:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:48,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:48,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033203661] [2021-07-13 19:39:48,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033203661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:48,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450134550] [2021-07-13 19:39:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:48,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:48,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:48,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:48,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:48,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450134550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:48,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:48,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:48,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115495661] [2021-07-13 19:39:48,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:48,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:48,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:48,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:48,522 INFO L87 Difference]: Start difference. First operand 90 states and 184 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:48,592 INFO L93 Difference]: Finished difference Result 91 states and 184 transitions. [2021-07-13 19:39:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:48,593 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:39:48,593 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:39:48,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:39:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-07-13 19:39:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 175 transitions. [2021-07-13 19:39:48,594 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 175 transitions. Word has length 17 [2021-07-13 19:39:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:48,594 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 175 transitions. [2021-07-13 19:39:48,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 175 transitions. [2021-07-13 19:39:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:48,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:48,594 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:48,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1536 [2021-07-13 19:39:48,795 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:48,795 INFO L82 PathProgramCache]: Analyzing trace with hash -362702562, now seen corresponding path program 143 times [2021-07-13 19:39:48,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:48,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719497742] [2021-07-13 19:39:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:48,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:48,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719497742] [2021-07-13 19:39:48,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719497742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:48,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296928881] [2021-07-13 19:39:48,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:48,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:48,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:48,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:48,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:48,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296928881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:48,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:48,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:48,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124155958] [2021-07-13 19:39:48,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:48,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:48,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:48,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:48,968 INFO L87 Difference]: Start difference. First operand 86 states and 175 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:49,036 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-07-13 19:39:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:49,037 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:39:49,037 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:39:49,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:39:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-07-13 19:39:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-07-13 19:39:49,038 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 17 [2021-07-13 19:39:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:49,038 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-07-13 19:39:49,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-07-13 19:39:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:49,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:49,038 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:49,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1543 [2021-07-13 19:39:49,239 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:49,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:49,239 INFO L82 PathProgramCache]: Analyzing trace with hash 662034111, now seen corresponding path program 144 times [2021-07-13 19:39:49,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:49,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012910720] [2021-07-13 19:39:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:49,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012910720] [2021-07-13 19:39:49,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012910720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688589581] [2021-07-13 19:39:49,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:49,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:49,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:49,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:49,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688589581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:49,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:49,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288827845] [2021-07-13 19:39:49,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:49,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:49,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:49,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:49,412 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:49,476 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-07-13 19:39:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:49,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:49,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:49,477 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:39:49,477 INFO L226 Difference]: Without dead ends: 108 [2021-07-13 19:39:49,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-13 19:39:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2021-07-13 19:39:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.088888888888889) internal successors, (188), 90 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 188 transitions. [2021-07-13 19:39:49,478 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 188 transitions. Word has length 17 [2021-07-13 19:39:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:49,478 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 188 transitions. [2021-07-13 19:39:49,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 188 transitions. [2021-07-13 19:39:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:49,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:49,479 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:49,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1549,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:49,679 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:49,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2111081088, now seen corresponding path program 145 times [2021-07-13 19:39:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:49,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511696811] [2021-07-13 19:39:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:49,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511696811] [2021-07-13 19:39:49,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511696811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466938666] [2021-07-13 19:39:49,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:49,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466938666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:49,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:49,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070597172] [2021-07-13 19:39:49,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:49,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:49,875 INFO L87 Difference]: Start difference. First operand 91 states and 188 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:49,937 INFO L93 Difference]: Finished difference Result 110 states and 217 transitions. [2021-07-13 19:39:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:49,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:49,938 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:39:49,938 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:39:49,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:39:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2021-07-13 19:39:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.088888888888889) internal successors, (188), 90 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 188 transitions. [2021-07-13 19:39:49,939 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 188 transitions. Word has length 17 [2021-07-13 19:39:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:49,940 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 188 transitions. [2021-07-13 19:39:49,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 188 transitions. [2021-07-13 19:39:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:49,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:49,940 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:50,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1554,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:50,163 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:50,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:50,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1056490115, now seen corresponding path program 146 times [2021-07-13 19:39:50,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:50,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528060909] [2021-07-13 19:39:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:50,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:50,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528060909] [2021-07-13 19:39:50,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528060909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:50,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641067521] [2021-07-13 19:39:50,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:50,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:50,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:50,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:50,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:50,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641067521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:50,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:50,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:50,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927745096] [2021-07-13 19:39:50,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:50,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:50,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:50,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:50,342 INFO L87 Difference]: Start difference. First operand 91 states and 188 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:50,404 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-07-13 19:39:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:50,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:50,404 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:39:50,404 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:39:50,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:39:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-07-13 19:39:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.088888888888889) internal successors, (188), 90 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 188 transitions. [2021-07-13 19:39:50,406 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 188 transitions. Word has length 17 [2021-07-13 19:39:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:50,406 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 188 transitions. [2021-07-13 19:39:50,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 188 transitions. [2021-07-13 19:39:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:50,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:50,406 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:50,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:50,606 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash -869048828, now seen corresponding path program 147 times [2021-07-13 19:39:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:50,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294614137] [2021-07-13 19:39:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:50,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:50,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294614137] [2021-07-13 19:39:50,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294614137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:50,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918276085] [2021-07-13 19:39:50,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:50,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:50,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:50,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918276085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:50,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:50,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:50,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776293745] [2021-07-13 19:39:50,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:50,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:50,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:50,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:50,833 INFO L87 Difference]: Start difference. First operand 91 states and 188 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:50,933 INFO L93 Difference]: Finished difference Result 112 states and 218 transitions. [2021-07-13 19:39:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:50,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:50,933 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:39:50,933 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:39:50,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:39:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-07-13 19:39:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 89 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 185 transitions. [2021-07-13 19:39:50,935 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 185 transitions. Word has length 17 [2021-07-13 19:39:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:50,935 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 185 transitions. [2021-07-13 19:39:50,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 185 transitions. [2021-07-13 19:39:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:50,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:50,936 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:51,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1566 [2021-07-13 19:39:51,160 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:51,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1594345693, now seen corresponding path program 148 times [2021-07-13 19:39:51,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:51,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530836847] [2021-07-13 19:39:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:51,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530836847] [2021-07-13 19:39:51,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530836847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702902014] [2021-07-13 19:39:51,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:51,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:51,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:51,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:51,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702902014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:51,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:39:51,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170772998] [2021-07-13 19:39:51,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:39:51,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:39:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:51,325 INFO L87 Difference]: Start difference. First operand 90 states and 185 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:51,415 INFO L93 Difference]: Finished difference Result 96 states and 194 transitions. [2021-07-13 19:39:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:51,416 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:39:51,416 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:39:51,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:39:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2021-07-13 19:39:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 173 transitions. [2021-07-13 19:39:51,417 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 173 transitions. Word has length 17 [2021-07-13 19:39:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:51,417 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 173 transitions. [2021-07-13 19:39:51,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,418 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 173 transitions. [2021-07-13 19:39:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:51,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:51,418 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:51,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1572 [2021-07-13 19:39:51,633 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1279747708, now seen corresponding path program 149 times [2021-07-13 19:39:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:51,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954679199] [2021-07-13 19:39:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:51,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954679199] [2021-07-13 19:39:51,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954679199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89025841] [2021-07-13 19:39:51,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:51,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:51,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:51,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89025841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:51,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:51,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643846018] [2021-07-13 19:39:51,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:51,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:51,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:51,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:51,857 INFO L87 Difference]: Start difference. First operand 85 states and 173 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:51,937 INFO L93 Difference]: Finished difference Result 89 states and 177 transitions. [2021-07-13 19:39:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:51,938 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:39:51,938 INFO L226 Difference]: Without dead ends: 85 [2021-07-13 19:39:51,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:51,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-13 19:39:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-07-13 19:39:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-07-13 19:39:51,940 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-07-13 19:39:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:51,940 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-07-13 19:39:51,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-07-13 19:39:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:51,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:51,941 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:52,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1574 [2021-07-13 19:39:52,160 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2145169049, now seen corresponding path program 150 times [2021-07-13 19:39:52,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:52,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14199856] [2021-07-13 19:39:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:52,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:52,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14199856] [2021-07-13 19:39:52,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14199856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:52,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024437099] [2021-07-13 19:39:52,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:52,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:52,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:52,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:52,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:52,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024437099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:52,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:52,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:52,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194782437] [2021-07-13 19:39:52,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:52,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:52,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:52,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:52,338 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:52,416 INFO L93 Difference]: Finished difference Result 115 states and 222 transitions. [2021-07-13 19:39:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:52,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:52,417 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:39:52,417 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:39:52,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:39:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2021-07-13 19:39:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-07-13 19:39:52,418 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-07-13 19:39:52,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:52,418 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-07-13 19:39:52,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-07-13 19:39:52,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:52,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:52,419 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:52,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:52,633 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:52,633 INFO L82 PathProgramCache]: Analyzing trace with hash -627946150, now seen corresponding path program 151 times [2021-07-13 19:39:52,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:52,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959291449] [2021-07-13 19:39:52,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:52,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:52,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959291449] [2021-07-13 19:39:52,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959291449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:52,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783636649] [2021-07-13 19:39:52,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:52,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:52,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:52,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783636649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:52,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:52,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:52,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557542640] [2021-07-13 19:39:52,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:52,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:52,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:52,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:52,852 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:52,947 INFO L93 Difference]: Finished difference Result 112 states and 221 transitions. [2021-07-13 19:39:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:52,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:52,948 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:39:52,948 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:39:52,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:39:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2021-07-13 19:39:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-07-13 19:39:52,950 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-07-13 19:39:52,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:52,950 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-07-13 19:39:52,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,950 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-07-13 19:39:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:52,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:52,950 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:53,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1585,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:53,165 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:53,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1755342243, now seen corresponding path program 152 times [2021-07-13 19:39:53,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:53,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642081200] [2021-07-13 19:39:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:53,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:53,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642081200] [2021-07-13 19:39:53,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642081200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:53,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245093821] [2021-07-13 19:39:53,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:53,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:53,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:53,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:53,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245093821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:53,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:53,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:53,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472202959] [2021-07-13 19:39:53,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:53,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:53,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:53,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:53,339 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:53,412 INFO L93 Difference]: Finished difference Result 115 states and 225 transitions. [2021-07-13 19:39:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:53,412 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:39:53,412 INFO L226 Difference]: Without dead ends: 115 [2021-07-13 19:39:53,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-13 19:39:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2021-07-13 19:39:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-07-13 19:39:53,413 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-07-13 19:39:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:53,414 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-07-13 19:39:53,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-07-13 19:39:53,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:53,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:53,414 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:53,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1591,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:53,614 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash 614086110, now seen corresponding path program 153 times [2021-07-13 19:39:53,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:53,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399967864] [2021-07-13 19:39:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:53,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:53,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399967864] [2021-07-13 19:39:53,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399967864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:53,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253377424] [2021-07-13 19:39:53,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:53,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:53,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:53,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:53,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253377424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:53,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:53,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:39:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205005842] [2021-07-13 19:39:53,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:39:53,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:53,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:39:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:53,836 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:53,909 INFO L93 Difference]: Finished difference Result 114 states and 222 transitions. [2021-07-13 19:39:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:53,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:53,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:53,910 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:39:53,910 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:39:53,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:39:53,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:39:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2021-07-13 19:39:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 186 transitions. [2021-07-13 19:39:53,911 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 186 transitions. Word has length 17 [2021-07-13 19:39:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:53,911 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 186 transitions. [2021-07-13 19:39:53,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 186 transitions. [2021-07-13 19:39:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:53,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:53,911 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:54,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1597,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,112 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1217486665, now seen corresponding path program 154 times [2021-07-13 19:39:54,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:54,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671965625] [2021-07-13 19:39:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671965625] [2021-07-13 19:39:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671965625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134596690] [2021-07-13 19:39:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:54,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:54,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134596690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:54,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:54,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307917753] [2021-07-13 19:39:54,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:54,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:54,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:54,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:54,301 INFO L87 Difference]: Start difference. First operand 90 states and 186 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:54,377 INFO L93 Difference]: Finished difference Result 107 states and 216 transitions. [2021-07-13 19:39:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:54,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:54,377 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:39:54,377 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:39:54,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:54,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:39:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 90. [2021-07-13 19:39:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 186 transitions. [2021-07-13 19:39:54,379 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 186 transitions. Word has length 17 [2021-07-13 19:39:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:54,379 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 186 transitions. [2021-07-13 19:39:54,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 186 transitions. [2021-07-13 19:39:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:54,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:54,379 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:54,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1603,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,579 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1532084650, now seen corresponding path program 155 times [2021-07-13 19:39:54,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:54,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784383683] [2021-07-13 19:39:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:54,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784383683] [2021-07-13 19:39:54,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784383683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388657974] [2021-07-13 19:39:54,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:54,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:54,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388657974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:54,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:54,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700302439] [2021-07-13 19:39:54,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:54,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:54,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:54,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:54,813 INFO L87 Difference]: Start difference. First operand 90 states and 186 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:54,907 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-07-13 19:39:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:54,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:54,908 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:39:54,908 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:39:54,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:39:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:39:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-07-13 19:39:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 183 transitions. [2021-07-13 19:39:54,909 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 183 transitions. Word has length 17 [2021-07-13 19:39:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:54,909 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 183 transitions. [2021-07-13 19:39:54,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 183 transitions. [2021-07-13 19:39:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:54,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:54,910 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:55,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1606,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:55,119 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:55,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1723832931, now seen corresponding path program 156 times [2021-07-13 19:39:55,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:55,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248660723] [2021-07-13 19:39:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:55,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248660723] [2021-07-13 19:39:55,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248660723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640380018] [2021-07-13 19:39:55,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:55,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:55,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:55,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:55,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640380018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:55,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:39:55,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713950656] [2021-07-13 19:39:55,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:39:55,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:39:55,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:55,273 INFO L87 Difference]: Start difference. First operand 89 states and 183 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:55,339 INFO L93 Difference]: Finished difference Result 100 states and 201 transitions. [2021-07-13 19:39:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:55,340 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:39:55,340 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:39:55,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:39:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2021-07-13 19:39:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-07-13 19:39:55,341 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-07-13 19:39:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:55,341 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-07-13 19:39:55,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-07-13 19:39:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:55,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:55,341 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:55,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1610 [2021-07-13 19:39:55,542 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash 656098526, now seen corresponding path program 157 times [2021-07-13 19:39:55,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:55,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444597634] [2021-07-13 19:39:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:55,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444597634] [2021-07-13 19:39:55,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444597634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215110349] [2021-07-13 19:39:55,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:55,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215110349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:55,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:55,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043471636] [2021-07-13 19:39:55,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:55,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:55,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:55,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:55,719 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:55,800 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2021-07-13 19:39:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:55,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:55,801 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:39:55,801 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:39:55,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:39:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-07-13 19:39:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0375) internal successors, (163), 80 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 163 transitions. [2021-07-13 19:39:55,802 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 163 transitions. Word has length 17 [2021-07-13 19:39:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:55,802 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 163 transitions. [2021-07-13 19:39:55,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 163 transitions. [2021-07-13 19:39:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:55,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:55,802 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:56,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1613,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,003 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash 697142802, now seen corresponding path program 158 times [2021-07-13 19:39:56,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:56,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26066446] [2021-07-13 19:39:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:56,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26066446] [2021-07-13 19:39:56,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26066446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498356691] [2021-07-13 19:39:56,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:56,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:56,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:56,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498356691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:56,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:39:56,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191971515] [2021-07-13 19:39:56,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:39:56,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:56,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:39:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:56,174 INFO L87 Difference]: Start difference. First operand 81 states and 163 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:56,236 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-07-13 19:39:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:56,237 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:39:56,237 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:39:56,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:39:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:39:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2021-07-13 19:39:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.037037037037037) internal successors, (165), 81 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 165 transitions. [2021-07-13 19:39:56,238 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 165 transitions. Word has length 17 [2021-07-13 19:39:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:56,238 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 165 transitions. [2021-07-13 19:39:56,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 165 transitions. [2021-07-13 19:39:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:56,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:56,238 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:56,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1617,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,439 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:56,439 INFO L82 PathProgramCache]: Analyzing trace with hash 107602287, now seen corresponding path program 159 times [2021-07-13 19:39:56,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:56,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620254924] [2021-07-13 19:39:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:56,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620254924] [2021-07-13 19:39:56,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620254924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072329383] [2021-07-13 19:39:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:56,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:56,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:56,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072329383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:56,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:56,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276645760] [2021-07-13 19:39:56,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:56,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:56,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:56,637 INFO L87 Difference]: Start difference. First operand 82 states and 165 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:56,790 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-07-13 19:39:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:56,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:56,791 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:39:56,791 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:39:56,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:39:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:39:56,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2021-07-13 19:39:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.058139534883721) internal successors, (177), 86 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 177 transitions. [2021-07-13 19:39:56,792 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 177 transitions. Word has length 17 [2021-07-13 19:39:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:56,792 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 177 transitions. [2021-07-13 19:39:56,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 177 transitions. [2021-07-13 19:39:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:56,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:56,793 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:57,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1620,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:57,003 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:57,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1629454384, now seen corresponding path program 160 times [2021-07-13 19:39:57,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:57,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541813452] [2021-07-13 19:39:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:57,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541813452] [2021-07-13 19:39:57,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541813452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982208712] [2021-07-13 19:39:57,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:57,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:57,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982208712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:57,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:57,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407793477] [2021-07-13 19:39:57,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:57,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:57,179 INFO L87 Difference]: Start difference. First operand 87 states and 177 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:57,234 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-07-13 19:39:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:57,234 INFO L225 Difference]: With dead ends: 116 [2021-07-13 19:39:57,234 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 19:39:57,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 19:39:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2021-07-13 19:39:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.058139534883721) internal successors, (177), 86 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 177 transitions. [2021-07-13 19:39:57,236 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 177 transitions. Word has length 17 [2021-07-13 19:39:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:57,236 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 177 transitions. [2021-07-13 19:39:57,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 177 transitions. [2021-07-13 19:39:57,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:57,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:57,236 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:57,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1625,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:57,437 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash 502058291, now seen corresponding path program 161 times [2021-07-13 19:39:57,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:57,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972776687] [2021-07-13 19:39:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:57,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972776687] [2021-07-13 19:39:57,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972776687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464465503] [2021-07-13 19:39:57,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:57,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:57,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:57,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464465503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:57,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:57,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061648198] [2021-07-13 19:39:57,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:57,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:57,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:57,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:57,635 INFO L87 Difference]: Start difference. First operand 87 states and 177 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:57,740 INFO L93 Difference]: Finished difference Result 88 states and 177 transitions. [2021-07-13 19:39:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:57,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:57,741 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:39:57,741 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:39:57,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:39:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-07-13 19:39:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-07-13 19:39:57,742 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-07-13 19:39:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:57,742 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-07-13 19:39:57,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-07-13 19:39:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:57,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:57,742 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:57,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1631 [2021-07-13 19:39:57,943 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1423480652, now seen corresponding path program 162 times [2021-07-13 19:39:57,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:57,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141198004] [2021-07-13 19:39:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:58,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141198004] [2021-07-13 19:39:58,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141198004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681771367] [2021-07-13 19:39:58,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:58,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:58,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681771367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:58,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:58,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093033165] [2021-07-13 19:39:58,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:58,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:58,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:58,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:58,119 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:58,180 INFO L93 Difference]: Finished difference Result 93 states and 185 transitions. [2021-07-13 19:39:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:58,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:58,181 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:39:58,181 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:39:58,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:39:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2021-07-13 19:39:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0375) internal successors, (163), 80 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 163 transitions. [2021-07-13 19:39:58,182 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 163 transitions. Word has length 17 [2021-07-13 19:39:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:58,182 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 163 transitions. [2021-07-13 19:39:58,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 163 transitions. [2021-07-13 19:39:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:58,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:58,182 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:58,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1635,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,383 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash -398743979, now seen corresponding path program 163 times [2021-07-13 19:39:58,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:58,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762228720] [2021-07-13 19:39:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:58,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762228720] [2021-07-13 19:39:58,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762228720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806883873] [2021-07-13 19:39:58,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:58,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806883873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:58,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:58,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611009120] [2021-07-13 19:39:58,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:58,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:58,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:58,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:58,553 INFO L87 Difference]: Start difference. First operand 81 states and 163 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:58,624 INFO L93 Difference]: Finished difference Result 107 states and 205 transitions. [2021-07-13 19:39:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:58,625 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:39:58,625 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:39:58,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:39:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2021-07-13 19:39:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-07-13 19:39:58,626 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-07-13 19:39:58,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:58,626 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-07-13 19:39:58,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-07-13 19:39:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:58,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:58,626 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:58,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1641,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,827 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:58,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1123108118, now seen corresponding path program 164 times [2021-07-13 19:39:58,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:58,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167454437] [2021-07-13 19:39:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:58,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167454437] [2021-07-13 19:39:58,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167454437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368693492] [2021-07-13 19:39:58,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:58,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:58,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368693492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:59,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:39:59,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957389184] [2021-07-13 19:39:59,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:39:59,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:39:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:59,033 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:59,104 INFO L93 Difference]: Finished difference Result 106 states and 207 transitions. [2021-07-13 19:39:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:59,104 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:39:59,104 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:39:59,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:39:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:39:59,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2021-07-13 19:39:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-07-13 19:39:59,106 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-07-13 19:39:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:59,106 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-07-13 19:39:59,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-07-13 19:39:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:59,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:59,106 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:59,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1646 [2021-07-13 19:39:59,306 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:59,307 INFO L82 PathProgramCache]: Analyzing trace with hash -4287975, now seen corresponding path program 165 times [2021-07-13 19:39:59,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:59,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802887748] [2021-07-13 19:39:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:59,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802887748] [2021-07-13 19:39:59,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802887748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70903892] [2021-07-13 19:39:59,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:59,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:59,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:59,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:59,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70903892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:59,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:39:59,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681618638] [2021-07-13 19:39:59,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:39:59,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:59,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:39:59,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:59,494 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:59,569 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2021-07-13 19:39:59,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:59,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:39:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:59,569 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:39:59,569 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:39:59,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:39:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:39:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2021-07-13 19:39:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-07-13 19:39:59,570 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-07-13 19:39:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:59,571 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-07-13 19:39:59,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-07-13 19:39:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:39:59,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:59,571 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:59,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1651 [2021-07-13 19:39:59,771 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:59,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:59,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1929826918, now seen corresponding path program 166 times [2021-07-13 19:39:59,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:59,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079907566] [2021-07-13 19:39:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:59,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079907566] [2021-07-13 19:39:59,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079907566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166737748] [2021-07-13 19:39:59,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:59,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:59,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:59,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:39:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:00,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:00,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-13 19:40:00,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:00,025 INFO L628 ElimStorePlain]: treesize reduction 1, result has 92.3 percent of original size [2021-07-13 19:40:00,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:00,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 19:40:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166737748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:00,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:00,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391367816] [2021-07-13 19:40:00,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:00,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:00,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:00,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:00,057 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:00,261 INFO L93 Difference]: Finished difference Result 108 states and 208 transitions. [2021-07-13 19:40:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:00,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:00,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:00,262 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:40:00,262 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:40:00,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:40:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2021-07-13 19:40:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 175 transitions. [2021-07-13 19:40:00,264 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 175 transitions. Word has length 17 [2021-07-13 19:40:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:00,264 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 175 transitions. [2021-07-13 19:40:00,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,264 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 175 transitions. [2021-07-13 19:40:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:00,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:00,264 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:00,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-07-13 19:40:00,477 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:00,477 INFO L82 PathProgramCache]: Analyzing trace with hash 533567603, now seen corresponding path program 167 times [2021-07-13 19:40:00,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:00,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32617749] [2021-07-13 19:40:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:00,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32617749] [2021-07-13 19:40:00,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32617749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738180585] [2021-07-13 19:40:00,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:00,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:40:00,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:00,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738180585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:00,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:40:00,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010953077] [2021-07-13 19:40:00,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:40:00,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:00,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:40:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:40:00,651 INFO L87 Difference]: Start difference. First operand 86 states and 175 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:00,700 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-07-13 19:40:00,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:00,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:00,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:00,701 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:40:00,701 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:40:00,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:40:00,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:40:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-07-13 19:40:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0375) internal successors, (163), 80 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 163 transitions. [2021-07-13 19:40:00,702 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 163 transitions. Word has length 17 [2021-07-13 19:40:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:00,703 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 163 transitions. [2021-07-13 19:40:00,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 163 transitions. [2021-07-13 19:40:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:00,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:00,703 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:00,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:00,909 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash 218969618, now seen corresponding path program 168 times [2021-07-13 19:40:00,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:00,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252823990] [2021-07-13 19:40:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:01,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252823990] [2021-07-13 19:40:01,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252823990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695818106] [2021-07-13 19:40:01,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:01,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:01,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:01,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695818106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:01,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:01,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029919161] [2021-07-13 19:40:01,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:01,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:01,205 INFO L87 Difference]: Start difference. First operand 81 states and 163 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:01,397 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-07-13 19:40:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:01,397 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:01,398 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:40:01,398 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:40:01,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:40:01,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-07-13 19:40:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 158 transitions. [2021-07-13 19:40:01,399 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 158 transitions. Word has length 17 [2021-07-13 19:40:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:01,399 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 158 transitions. [2021-07-13 19:40:01,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 158 transitions. [2021-07-13 19:40:01,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:01,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:01,399 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:01,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-07-13 19:40:01,600 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:01,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1688724240, now seen corresponding path program 169 times [2021-07-13 19:40:01,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:01,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714702241] [2021-07-13 19:40:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:01,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714702241] [2021-07-13 19:40:01,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714702241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915071762] [2021-07-13 19:40:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:01,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:01,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915071762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:01,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:01,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562543416] [2021-07-13 19:40:01,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:01,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:01,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:01,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:01,823 INFO L87 Difference]: Start difference. First operand 79 states and 158 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:01,906 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-07-13 19:40:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:01,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:01,907 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:40:01,907 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:40:01,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:40:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2021-07-13 19:40:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.049382716049383) internal successors, (166), 81 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2021-07-13 19:40:01,908 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 17 [2021-07-13 19:40:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:01,908 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2021-07-13 19:40:01,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2021-07-13 19:40:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:01,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:01,910 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:02,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1688,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:02,110 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:02,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1478846963, now seen corresponding path program 170 times [2021-07-13 19:40:02,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:02,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585508326] [2021-07-13 19:40:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:02,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585508326] [2021-07-13 19:40:02,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585508326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962964189] [2021-07-13 19:40:02,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:02,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:02,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:02,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:02,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962964189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:02,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:40:02,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415730182] [2021-07-13 19:40:02,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:40:02,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:40:02,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:40:02,294 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:02,356 INFO L93 Difference]: Finished difference Result 124 states and 238 transitions. [2021-07-13 19:40:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:02,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:02,357 INFO L225 Difference]: With dead ends: 124 [2021-07-13 19:40:02,357 INFO L226 Difference]: Without dead ends: 124 [2021-07-13 19:40:02,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:40:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-13 19:40:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 84. [2021-07-13 19:40:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-07-13 19:40:02,358 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-07-13 19:40:02,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:02,358 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-07-13 19:40:02,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,358 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-07-13 19:40:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:02,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:02,359 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:02,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1694 [2021-07-13 19:40:02,570 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:02,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2016702541, now seen corresponding path program 171 times [2021-07-13 19:40:02,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:02,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281647440] [2021-07-13 19:40:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:02,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281647440] [2021-07-13 19:40:02,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281647440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895604879] [2021-07-13 19:40:02,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:02,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:02,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895604879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:02,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:40:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492877603] [2021-07-13 19:40:02,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:40:02,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:40:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:40:02,739 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:02,815 INFO L93 Difference]: Finished difference Result 101 states and 204 transitions. [2021-07-13 19:40:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:02,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:02,816 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:40:02,816 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:40:02,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:40:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:40:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2021-07-13 19:40:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-07-13 19:40:02,817 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-07-13 19:40:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:02,817 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-07-13 19:40:02,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-07-13 19:40:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:02,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:02,818 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:03,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1699,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:03,018 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1702104556, now seen corresponding path program 172 times [2021-07-13 19:40:03,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:03,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894661921] [2021-07-13 19:40:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:03,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894661921] [2021-07-13 19:40:03,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894661921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363543786] [2021-07-13 19:40:03,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:03,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:03,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:03,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:03,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363543786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:03,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:03,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395454331] [2021-07-13 19:40:03,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:03,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:03,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:03,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:03,275 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:03,379 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-07-13 19:40:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:03,380 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:03,380 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:40:03,380 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:40:03,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:40:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-07-13 19:40:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2021-07-13 19:40:03,381 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 17 [2021-07-13 19:40:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:03,381 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2021-07-13 19:40:03,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2021-07-13 19:40:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:03,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:03,382 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:03,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1701 [2021-07-13 19:40:03,582 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1510356275, now seen corresponding path program 173 times [2021-07-13 19:40:03,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:03,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958537375] [2021-07-13 19:40:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:03,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958537375] [2021-07-13 19:40:03,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958537375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124914774] [2021-07-13 19:40:03,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:03,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:03,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:03,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124914774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:03,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:40:03,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479530521] [2021-07-13 19:40:03,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:40:03,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:40:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:40:03,740 INFO L87 Difference]: Start difference. First operand 83 states and 171 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:03,799 INFO L93 Difference]: Finished difference Result 97 states and 194 transitions. [2021-07-13 19:40:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:03,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:03,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:03,799 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:40:03,799 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:40:03,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:40:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:40:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2021-07-13 19:40:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.037974683544304) internal successors, (161), 79 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 161 transitions. [2021-07-13 19:40:03,800 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 161 transitions. Word has length 17 [2021-07-13 19:40:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:03,801 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 161 transitions. [2021-07-13 19:40:03,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 161 transitions. [2021-07-13 19:40:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:03,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:03,801 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:04,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1705 [2021-07-13 19:40:04,001 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash -404679564, now seen corresponding path program 174 times [2021-07-13 19:40:04,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:04,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057996550] [2021-07-13 19:40:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:04,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:04,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057996550] [2021-07-13 19:40:04,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057996550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:04,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132053102] [2021-07-13 19:40:04,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:04,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:04,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:04,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:04,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132053102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:04,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:04,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:40:04,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537730313] [2021-07-13 19:40:04,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:40:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:40:04,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:40:04,181 INFO L87 Difference]: Start difference. First operand 80 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:04,266 INFO L93 Difference]: Finished difference Result 86 states and 168 transitions. [2021-07-13 19:40:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:04,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:04,266 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:40:04,266 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:40:04,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:40:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-07-13 19:40:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-07-13 19:40:04,267 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-07-13 19:40:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:04,267 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-07-13 19:40:04,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-07-13 19:40:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:04,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:04,268 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:04,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1708,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:04,468 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:04,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash 493814426, now seen corresponding path program 175 times [2021-07-13 19:40:04,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:04,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523115381] [2021-07-13 19:40:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:04,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:04,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523115381] [2021-07-13 19:40:04,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523115381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:04,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62052349] [2021-07-13 19:40:04,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:04,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:04,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62052349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:04,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:04,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:40:04,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022888734] [2021-07-13 19:40:04,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:04,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:04,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:04,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:04,770 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:04,898 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2021-07-13 19:40:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:04,899 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:04,899 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:40:04,899 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:40:04,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:04,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:40:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2021-07-13 19:40:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-07-13 19:40:04,901 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-07-13 19:40:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:04,901 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-07-13 19:40:04,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-07-13 19:40:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:04,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:04,901 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:05,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1713 [2021-07-13 19:40:05,117 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash -633581667, now seen corresponding path program 176 times [2021-07-13 19:40:05,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:05,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698902549] [2021-07-13 19:40:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:05,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:05,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698902549] [2021-07-13 19:40:05,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698902549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394433377] [2021-07-13 19:40:05,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:05,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:05,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:05,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:05,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:05,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394433377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:05,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:40:05,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703272724] [2021-07-13 19:40:05,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:40:05,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:40:05,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:40:05,283 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:05,379 INFO L93 Difference]: Finished difference Result 120 states and 228 transitions. [2021-07-13 19:40:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:05,379 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:40:05,379 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:40:05,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:40:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 80. [2021-07-13 19:40:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-07-13 19:40:05,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 17 [2021-07-13 19:40:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:05,381 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-07-13 19:40:05,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-07-13 19:40:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:05,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:05,381 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:05,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1720,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:05,581 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:05,582 INFO L82 PathProgramCache]: Analyzing trace with hash -95726089, now seen corresponding path program 177 times [2021-07-13 19:40:05,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:05,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258901497] [2021-07-13 19:40:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:05,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258901497] [2021-07-13 19:40:05,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258901497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491334483] [2021-07-13 19:40:05,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:05,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:05,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:05,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:05,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491334483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:05,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:40:05,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48995414] [2021-07-13 19:40:05,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:40:05,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:40:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:40:05,748 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:05,825 INFO L93 Difference]: Finished difference Result 97 states and 194 transitions. [2021-07-13 19:40:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:05,826 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:40:05,826 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:40:05,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:40:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:40:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2021-07-13 19:40:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-07-13 19:40:05,827 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 17 [2021-07-13 19:40:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:05,827 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-07-13 19:40:05,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-07-13 19:40:05,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:05,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:05,828 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:06,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1725,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:06,028 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:06,029 INFO L82 PathProgramCache]: Analyzing trace with hash -410324074, now seen corresponding path program 178 times [2021-07-13 19:40:06,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:06,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237921602] [2021-07-13 19:40:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:06,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237921602] [2021-07-13 19:40:06,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237921602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260059346] [2021-07-13 19:40:06,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:06,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:06,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260059346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:06,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:40:06,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267149922] [2021-07-13 19:40:06,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:06,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:06,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:06,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:06,266 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:06,372 INFO L93 Difference]: Finished difference Result 104 states and 197 transitions. [2021-07-13 19:40:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:06,372 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:06,373 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:40:06,373 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:40:06,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:06,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:40:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-07-13 19:40:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-07-13 19:40:06,374 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-07-13 19:40:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:06,374 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-07-13 19:40:06,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-07-13 19:40:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:06,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:06,374 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:06,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:06,575 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:06,575 INFO L82 PathProgramCache]: Analyzing trace with hash -602072355, now seen corresponding path program 179 times [2021-07-13 19:40:06,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:06,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208339399] [2021-07-13 19:40:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:06,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208339399] [2021-07-13 19:40:06,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208339399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219056405] [2021-07-13 19:40:06,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:06,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:06,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:06,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:06,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219056405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:06,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:40:06,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064044057] [2021-07-13 19:40:06,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:40:06,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:40:06,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:40:06,731 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:06,821 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-07-13 19:40:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:06,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:06,821 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:40:06,821 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:40:06,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:40:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:40:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2021-07-13 19:40:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-07-13 19:40:06,822 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-07-13 19:40:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:06,822 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-07-13 19:40:06,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-07-13 19:40:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:06,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:06,823 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:07,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1733,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:07,025 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1777859102, now seen corresponding path program 180 times [2021-07-13 19:40:07,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:07,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373075634] [2021-07-13 19:40:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:07,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373075634] [2021-07-13 19:40:07,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373075634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220297893] [2021-07-13 19:40:07,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:07,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:07,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:07,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220297893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:07,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:40:07,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659798146] [2021-07-13 19:40:07,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:40:07,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:40:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:40:07,229 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:07,347 INFO L93 Difference]: Finished difference Result 105 states and 197 transitions. [2021-07-13 19:40:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:07,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:07,348 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:40:07,348 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:40:07,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:40:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2021-07-13 19:40:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-07-13 19:40:07,349 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-07-13 19:40:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:07,349 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-07-13 19:40:07,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-07-13 19:40:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:07,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:07,350 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:07,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1735 [2021-07-13 19:40:07,565 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:07,565 INFO L82 PathProgramCache]: Analyzing trace with hash 438163443, now seen corresponding path program 181 times [2021-07-13 19:40:07,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:07,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273979228] [2021-07-13 19:40:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:07,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273979228] [2021-07-13 19:40:07,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273979228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719414392] [2021-07-13 19:40:07,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719414392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:07,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:40:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456600074] [2021-07-13 19:40:07,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:40:07,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:40:07,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:40:07,711 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:07,786 INFO L93 Difference]: Finished difference Result 113 states and 213 transitions. [2021-07-13 19:40:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:07,786 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:40:07,786 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:40:07,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:40:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:40:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 73. [2021-07-13 19:40:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-07-13 19:40:07,788 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-07-13 19:40:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:07,788 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-07-13 19:40:07,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-07-13 19:40:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:40:07,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:07,788 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:07,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1740 [2021-07-13 19:40:07,988 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash 449161682, now seen corresponding path program 182 times [2021-07-13 19:40:07,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:07,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358784580] [2021-07-13 19:40:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:08,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:08,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358784580] [2021-07-13 19:40:08,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358784580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:08,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042825537] [2021-07-13 19:40:08,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:08,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:40:08,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:08,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042825537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:08,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:08,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:40:08,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240504469] [2021-07-13 19:40:08,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:40:08,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:08,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:40:08,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:40:08,172 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:08,354 INFO L93 Difference]: Finished difference Result 84 states and 160 transitions. [2021-07-13 19:40:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:40:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:08,354 INFO L225 Difference]: With dead ends: 84 [2021-07-13 19:40:08,355 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:40:08,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:40:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-07-13 19:40:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 144 transitions. [2021-07-13 19:40:08,356 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 144 transitions. Word has length 17 [2021-07-13 19:40:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:08,356 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 144 transitions. [2021-07-13 19:40:08,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 144 transitions. [2021-07-13 19:40:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:08,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:08,356 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:08,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1742 [2021-07-13 19:40:08,556 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1483093275, now seen corresponding path program 183 times [2021-07-13 19:40:08,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:08,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569531981] [2021-07-13 19:40:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:08,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:08,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569531981] [2021-07-13 19:40:08,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569531981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:08,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129453910] [2021-07-13 19:40:08,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:08,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:08,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:08,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:08,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:09,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:09,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 1 [2021-07-13 19:40:09,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:40:09,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:40:09,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:09,231 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:40:09,236 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:40:09,242 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-07-13 19:40:09,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:40:09,253 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:09,259 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:09,263 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:09,268 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:09,272 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:09,275 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:09,280 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:09,286 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:09,291 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:09,294 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:09,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:40:09,299 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:09,302 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:09,363 INFO L628 ElimStorePlain]: treesize reduction 21, result has 73.8 percent of original size [2021-07-13 19:40:09,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:09,364 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:858, output treesize:41 [2021-07-13 19:40:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:09,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129453910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:09,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:09,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:40:09,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077973308] [2021-07-13 19:40:09,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:09,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:09,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:09,428 INFO L87 Difference]: Start difference. First operand 73 states and 144 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:10,100 INFO L93 Difference]: Finished difference Result 144 states and 272 transitions. [2021-07-13 19:40:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:10,101 INFO L225 Difference]: With dead ends: 144 [2021-07-13 19:40:10,101 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:40:10,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:40:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:40:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2021-07-13 19:40:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-07-13 19:40:10,102 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 18 [2021-07-13 19:40:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:10,102 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-07-13 19:40:10,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-07-13 19:40:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:10,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:10,102 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:10,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1746,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:10,303 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:10,303 INFO L82 PathProgramCache]: Analyzing trace with hash 993084581, now seen corresponding path program 184 times [2021-07-13 19:40:10,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:10,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805220692] [2021-07-13 19:40:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:10,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805220692] [2021-07-13 19:40:10,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805220692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534646003] [2021-07-13 19:40:10,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:10,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:10,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:10,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:11,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:11,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:11,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:11,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:11,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:11,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:11,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:11,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:11,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:11,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:11,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:11,151 INFO L628 ElimStorePlain]: treesize reduction 166, result has 31.4 percent of original size [2021-07-13 19:40:11,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:11,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:11,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:11,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:11,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:11,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:11,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:11,235 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:40:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:11,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534646003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:11,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:11,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:40:11,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316959975] [2021-07-13 19:40:11,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:40:11,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:11,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:40:11,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:11,304 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:11,994 INFO L93 Difference]: Finished difference Result 140 states and 265 transitions. [2021-07-13 19:40:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:11,995 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:40:11,995 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:40:11,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1037.3ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:40:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 79. [2021-07-13 19:40:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-07-13 19:40:11,996 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-07-13 19:40:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:11,996 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-07-13 19:40:11,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-07-13 19:40:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:11,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:11,996 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:12,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:12,197 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:12,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:12,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2108182377, now seen corresponding path program 185 times [2021-07-13 19:40:12,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:12,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715061469] [2021-07-13 19:40:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:12,689 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-07-13 19:40:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:12,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:12,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715061469] [2021-07-13 19:40:12,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715061469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:12,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871502210] [2021-07-13 19:40:12,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:12,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:12,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:12,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:13,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:13,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:13,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:13,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:13,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:13,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:13,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:13,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:13,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:40:13,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:13,425 INFO L628 ElimStorePlain]: treesize reduction 154, result has 31.6 percent of original size [2021-07-13 19:40:13,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:13,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:13,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:13,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:13,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:13,458 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:13,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:13,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:13,484 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:40:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:13,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871502210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:13,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:13,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:40:13,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618325516] [2021-07-13 19:40:13,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:40:13,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:13,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:40:13,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:13,554 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:14,176 INFO L93 Difference]: Finished difference Result 144 states and 273 transitions. [2021-07-13 19:40:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:14,177 INFO L225 Difference]: With dead ends: 144 [2021-07-13 19:40:14,177 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 19:40:14,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1270.7ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:40:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 19:40:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 80. [2021-07-13 19:40:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 159 transitions. [2021-07-13 19:40:14,178 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 159 transitions. Word has length 18 [2021-07-13 19:40:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:14,179 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 159 transitions. [2021-07-13 19:40:14,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 159 transitions. [2021-07-13 19:40:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:14,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:14,179 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:14,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1823 [2021-07-13 19:40:14,397 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1451416613, now seen corresponding path program 186 times [2021-07-13 19:40:14,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:14,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064072569] [2021-07-13 19:40:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:14,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:14,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064072569] [2021-07-13 19:40:14,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064072569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:14,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389570432] [2021-07-13 19:40:14,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:14,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:14,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:14,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:14,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:14,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:14,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:14,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:14,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:14,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:14,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:14,934 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-07-13 19:40:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:15,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389570432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:15,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:15,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:40:15,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333819811] [2021-07-13 19:40:15,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:40:15,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:15,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:40:15,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:15,008 INFO L87 Difference]: Start difference. First operand 80 states and 159 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:15,573 INFO L93 Difference]: Finished difference Result 145 states and 276 transitions. [2021-07-13 19:40:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:15,574 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:15,574 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:40:15,574 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:40:15,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 776.2ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:40:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:40:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 81. [2021-07-13 19:40:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-07-13 19:40:15,575 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-07-13 19:40:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:15,575 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-07-13 19:40:15,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-07-13 19:40:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:15,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:15,576 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:15,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1849,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:15,776 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:15,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1845872617, now seen corresponding path program 187 times [2021-07-13 19:40:15,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:15,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607363222] [2021-07-13 19:40:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:15,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:15,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607363222] [2021-07-13 19:40:15,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607363222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:15,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837950360] [2021-07-13 19:40:15,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:16,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:16,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:16,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:16,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:16,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,518 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-07-13 19:40:16,519 INFO L628 ElimStorePlain]: treesize reduction 162, result has 31.6 percent of original size [2021-07-13 19:40:16,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:16,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:16,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:16,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:16,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:16,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:16,593 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-07-13 19:40:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837950360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:16,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:16,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:40:16,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298251614] [2021-07-13 19:40:16,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:40:16,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:16,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:40:16,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:16,698 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,230 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-13 19:40:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:17,243 INFO L93 Difference]: Finished difference Result 157 states and 295 transitions. [2021-07-13 19:40:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:17,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:17,244 INFO L225 Difference]: With dead ends: 157 [2021-07-13 19:40:17,244 INFO L226 Difference]: Without dead ends: 150 [2021-07-13 19:40:17,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 772.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-13 19:40:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 82. [2021-07-13 19:40:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.049382716049383) internal successors, (166), 81 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2021-07-13 19:40:17,245 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 18 [2021-07-13 19:40:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:17,245 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2021-07-13 19:40:17,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2021-07-13 19:40:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:17,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:17,246 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:17,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1859 [2021-07-13 19:40:17,446 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash 109094885, now seen corresponding path program 188 times [2021-07-13 19:40:17,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:17,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251246384] [2021-07-13 19:40:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:17,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:17,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251246384] [2021-07-13 19:40:17,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251246384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:17,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597754107] [2021-07-13 19:40:17,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:17,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:17,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:17,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:18,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:18,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:18,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:18,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:18,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:18,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:18,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:18,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:18,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,258 INFO L628 ElimStorePlain]: treesize reduction 160, result has 32.5 percent of original size [2021-07-13 19:40:18,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:18,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:18,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:18,293 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:18,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:18,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:18,320 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-07-13 19:40:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:18,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597754107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:18,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:18,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:40:18,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277819732] [2021-07-13 19:40:18,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:18,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:18,424 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:18,973 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-13 19:40:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:18,998 INFO L93 Difference]: Finished difference Result 145 states and 277 transitions. [2021-07-13 19:40:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:40:18,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:18,998 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:40:18,998 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:40:18,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:40:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 81. [2021-07-13 19:40:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-07-13 19:40:18,999 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-07-13 19:40:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:19,000 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-07-13 19:40:19,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-07-13 19:40:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:19,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:19,000 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:19,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1884 [2021-07-13 19:40:19,200 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1761287433, now seen corresponding path program 189 times [2021-07-13 19:40:19,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:19,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189091266] [2021-07-13 19:40:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:19,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:19,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189091266] [2021-07-13 19:40:19,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189091266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:19,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7831456] [2021-07-13 19:40:19,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:19,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:19,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:40:19,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:19,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:19,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:19,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:19,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,994 INFO L628 ElimStorePlain]: treesize reduction 256, result has 22.2 percent of original size [2021-07-13 19:40:19,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:19,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:20,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:20,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-07-13 19:40:20,030 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:20,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:20,056 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:498, output treesize:41 [2021-07-13 19:40:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7831456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:20,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:40:20,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175302887] [2021-07-13 19:40:20,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:40:20,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:40:20,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:20,125 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:20,695 INFO L93 Difference]: Finished difference Result 127 states and 245 transitions. [2021-07-13 19:40:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:40:20,695 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:20,695 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:40:20,695 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:40:20,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 832.1ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:40:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:40:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-07-13 19:40:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-07-13 19:40:20,697 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-07-13 19:40:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:20,697 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-07-13 19:40:20,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-07-13 19:40:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:20,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:20,697 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:20,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1910,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:20,898 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:20,898 INFO L82 PathProgramCache]: Analyzing trace with hash -646189637, now seen corresponding path program 190 times [2021-07-13 19:40:20,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:20,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101647055] [2021-07-13 19:40:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:21,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:21,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101647055] [2021-07-13 19:40:21,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101647055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:21,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933933449] [2021-07-13 19:40:21,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:21,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:21,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:21,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:21,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:21,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:21,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:21,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:21,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:21,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:21,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:21,497 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:41 [2021-07-13 19:40:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:21,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933933449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:21,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:21,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:40:21,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365124958] [2021-07-13 19:40:21,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:40:21,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:40:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:21,564 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:21,855 INFO L93 Difference]: Finished difference Result 129 states and 251 transitions. [2021-07-13 19:40:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:40:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:21,855 INFO L225 Difference]: With dead ends: 129 [2021-07-13 19:40:21,855 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:40:21,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:40:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-07-13 19:40:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-07-13 19:40:21,857 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-07-13 19:40:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:21,857 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-07-13 19:40:21,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-07-13 19:40:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:21,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:21,857 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:22,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1934 [2021-07-13 19:40:22,058 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:22,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1302955401, now seen corresponding path program 191 times [2021-07-13 19:40:22,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:22,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886697367] [2021-07-13 19:40:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:22,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886697367] [2021-07-13 19:40:22,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886697367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147119026] [2021-07-13 19:40:22,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:22,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:22,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:22,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:22,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:22,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:22,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:22,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:22,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:22,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:22,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:22,790 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:120, output treesize:41 [2021-07-13 19:40:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147119026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:22,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:40:22,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613482889] [2021-07-13 19:40:22,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:40:22,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:22,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:40:22,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:22,861 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:23,232 INFO L93 Difference]: Finished difference Result 130 states and 254 transitions. [2021-07-13 19:40:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:23,233 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:40:23,233 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:40:23,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 792.4ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:23,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:40:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-07-13 19:40:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-07-13 19:40:23,234 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-07-13 19:40:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:23,234 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-07-13 19:40:23,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-07-13 19:40:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:23,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:23,235 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:23,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1950,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:23,435 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:23,435 INFO L82 PathProgramCache]: Analyzing trace with hash -908499397, now seen corresponding path program 192 times [2021-07-13 19:40:23,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:23,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343274508] [2021-07-13 19:40:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:23,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:23,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343274508] [2021-07-13 19:40:23,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343274508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:23,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988836103] [2021-07-13 19:40:23,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:23,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:23,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:23,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:23,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:23,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:24,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:24,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:24,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:24,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:24,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:24,006 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:24,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:24,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:24,025 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-07-13 19:40:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:24,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988836103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:24,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:24,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:40:24,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003543427] [2021-07-13 19:40:24,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:40:24,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:24,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:40:24,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:24,140 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:24,509 INFO L93 Difference]: Finished difference Result 142 states and 273 transitions. [2021-07-13 19:40:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:24,509 INFO L225 Difference]: With dead ends: 142 [2021-07-13 19:40:24,509 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 19:40:24,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 658.2ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 19:40:24,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 88. [2021-07-13 19:40:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 183 transitions. [2021-07-13 19:40:24,511 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 183 transitions. Word has length 18 [2021-07-13 19:40:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:24,511 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 183 transitions. [2021-07-13 19:40:24,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 183 transitions. [2021-07-13 19:40:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:24,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:24,511 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:24,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1961 [2021-07-13 19:40:24,712 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:24,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1649690167, now seen corresponding path program 193 times [2021-07-13 19:40:24,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:24,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496888646] [2021-07-13 19:40:24,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:24,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:24,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496888646] [2021-07-13 19:40:24,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496888646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:24,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566489722] [2021-07-13 19:40:24,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:24,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:24,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:25,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:40:25,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:25,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:25,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:25,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:40:25,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,359 INFO L628 ElimStorePlain]: treesize reduction 260, result has 21.2 percent of original size [2021-07-13 19:40:25,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:25,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:25,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:25,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:25,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:25,420 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:40:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566489722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:25,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:25,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:40:25,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7659318] [2021-07-13 19:40:25,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:40:25,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:40:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:25,524 INFO L87 Difference]: Start difference. First operand 88 states and 183 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:25,872 INFO L93 Difference]: Finished difference Result 130 states and 255 transitions. [2021-07-13 19:40:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:40:25,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:25,872 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:40:25,872 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:40:25,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 551.0ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:40:25,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2021-07-13 19:40:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-07-13 19:40:25,874 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-07-13 19:40:25,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:25,874 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-07-13 19:40:25,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-07-13 19:40:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:25,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:25,874 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:26,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-07-13 19:40:26,075 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:26,075 INFO L82 PathProgramCache]: Analyzing trace with hash 836945301, now seen corresponding path program 194 times [2021-07-13 19:40:26,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:26,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181663258] [2021-07-13 19:40:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:26,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:26,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181663258] [2021-07-13 19:40:26,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181663258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:26,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061287327] [2021-07-13 19:40:26,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:26,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:26,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:26,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:26,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:26,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:26,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:26,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:26,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,812 INFO L628 ElimStorePlain]: treesize reduction 251, result has 23.2 percent of original size [2021-07-13 19:40:26,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:26,816 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:26,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:26,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:26,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:26,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:26,869 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:40:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:26,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061287327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:26,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:26,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:40:26,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410222681] [2021-07-13 19:40:26,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:40:26,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:26,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:40:26,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:26,937 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:27,357 INFO L93 Difference]: Finished difference Result 125 states and 244 transitions. [2021-07-13 19:40:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:40:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:27,358 INFO L225 Difference]: With dead ends: 125 [2021-07-13 19:40:27,358 INFO L226 Difference]: Without dead ends: 118 [2021-07-13 19:40:27,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 651.6ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-13 19:40:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2021-07-13 19:40:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 179 transitions. [2021-07-13 19:40:27,359 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 179 transitions. Word has length 18 [2021-07-13 19:40:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:27,359 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 179 transitions. [2021-07-13 19:40:27,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 179 transitions. [2021-07-13 19:40:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:27,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:27,360 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:27,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1994 [2021-07-13 19:40:27,560 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash 180179537, now seen corresponding path program 195 times [2021-07-13 19:40:27,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:27,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821338937] [2021-07-13 19:40:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:27,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:27,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821338937] [2021-07-13 19:40:27,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821338937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:27,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943147023] [2021-07-13 19:40:27,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:27,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:27,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:27,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:28,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:28,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:28,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:28,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:28,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:28,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:28,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:28,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:40:28,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,273 INFO L628 ElimStorePlain]: treesize reduction 166, result has 31.7 percent of original size [2021-07-13 19:40:28,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-07-13 19:40:28,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-13 19:40:28,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:28,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:28,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:28,332 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:361, output treesize:41 [2021-07-13 19:40:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:28,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943147023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:28,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:28,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:40:28,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517106571] [2021-07-13 19:40:28,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:40:28,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:40:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:28,399 INFO L87 Difference]: Start difference. First operand 88 states and 179 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:29,251 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-07-13 19:40:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:29,340 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-07-13 19:40:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:40:29,340 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:29,341 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:40:29,341 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:40:29,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1066.6ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:40:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:40:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2021-07-13 19:40:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.097826086956522) internal successors, (193), 92 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 193 transitions. [2021-07-13 19:40:29,342 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 193 transitions. Word has length 18 [2021-07-13 19:40:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:29,342 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 193 transitions. [2021-07-13 19:40:29,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 193 transitions. [2021-07-13 19:40:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:29,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:29,342 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:29,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2017 [2021-07-13 19:40:29,543 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash 574635541, now seen corresponding path program 196 times [2021-07-13 19:40:29,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:29,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939846506] [2021-07-13 19:40:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:29,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939846506] [2021-07-13 19:40:29,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939846506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792697262] [2021-07-13 19:40:29,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:29,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:29,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:29,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:30,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:30,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:30,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:30,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:30,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:30,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:30,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:30,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:30,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:30,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:30,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,212 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-07-13 19:40:30,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:30,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:30,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:30,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:30,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:30,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:30,273 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:40:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:30,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792697262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:30,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:30,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:40:30,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143363617] [2021-07-13 19:40:30,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:40:30,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:30,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:40:30,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:30,376 INFO L87 Difference]: Start difference. First operand 93 states and 193 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:30,871 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-07-13 19:40:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:40:30,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:30,872 INFO L225 Difference]: With dead ends: 148 [2021-07-13 19:40:30,872 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:40:30,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 730.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:40:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 95. [2021-07-13 19:40:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-07-13 19:40:30,873 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 18 [2021-07-13 19:40:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:30,873 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-07-13 19:40:30,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-07-13 19:40:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:30,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:30,874 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:31,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2042,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:31,074 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:31,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:31,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1162142191, now seen corresponding path program 197 times [2021-07-13 19:40:31,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:31,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38901363] [2021-07-13 19:40:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:31,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:31,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38901363] [2021-07-13 19:40:31,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38901363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:31,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392138739] [2021-07-13 19:40:31,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:31,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:31,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:31,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:31,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:31,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:31,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:31,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:31,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:31,490 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:31,494 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:31,497 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:31,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:31,517 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:180, output treesize:40 [2021-07-13 19:40:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:31,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392138739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:31,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:31,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:40:31,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142242012] [2021-07-13 19:40:31,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:40:31,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:31,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:40:31,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:31,638 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:32,116 INFO L93 Difference]: Finished difference Result 136 states and 271 transitions. [2021-07-13 19:40:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:40:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:32,117 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:40:32,117 INFO L226 Difference]: Without dead ends: 129 [2021-07-13 19:40:32,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:40:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-13 19:40:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2021-07-13 19:40:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-07-13 19:40:32,121 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 18 [2021-07-13 19:40:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:32,121 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-07-13 19:40:32,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-07-13 19:40:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:32,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:32,121 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:32,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2066,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,322 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:32,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:32,322 INFO L82 PathProgramCache]: Analyzing trace with hash -326166729, now seen corresponding path program 198 times [2021-07-13 19:40:32,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:32,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895829361] [2021-07-13 19:40:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:32,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895829361] [2021-07-13 19:40:32,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895829361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833849126] [2021-07-13 19:40:32,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:40:32,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:32,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:32,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:32,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:32,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:40:32,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:32,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:40:32,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:32,939 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:40:32,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:40:32,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:40:32,950 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:40:32,954 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:32,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:32,980 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:373, output treesize:41 [2021-07-13 19:40:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:33,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833849126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:33,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:33,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:40:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667885707] [2021-07-13 19:40:33,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:40:33,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:33,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:40:33,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:33,050 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,539 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-07-13 19:40:34,160 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-13 19:40:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:34,634 INFO L93 Difference]: Finished difference Result 215 states and 407 transitions. [2021-07-13 19:40:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:40:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:34,635 INFO L225 Difference]: With dead ends: 215 [2021-07-13 19:40:34,635 INFO L226 Difference]: Without dead ends: 182 [2021-07-13 19:40:34,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1643.8ms TimeCoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:40:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-07-13 19:40:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 110. [2021-07-13 19:40:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.146788990825688) internal successors, (234), 109 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 234 transitions. [2021-07-13 19:40:34,637 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 234 transitions. Word has length 18 [2021-07-13 19:40:34,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:34,637 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 234 transitions. [2021-07-13 19:40:34,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 234 transitions. [2021-07-13 19:40:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:34,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:34,641 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:34,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:34,864 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:34,864 INFO L82 PathProgramCache]: Analyzing trace with hash 68289275, now seen corresponding path program 199 times [2021-07-13 19:40:34,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:34,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675147973] [2021-07-13 19:40:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:35,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:35,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675147973] [2021-07-13 19:40:35,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675147973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:35,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021682886] [2021-07-13 19:40:35,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:35,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:35,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:35,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:35,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:35,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:35,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:35,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:35,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:35,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:35,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:35,656 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:40:35,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:35,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:35,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:35,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:35,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:35,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:35,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:35,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:35,719 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:40:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:35,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021682886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:35,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:35,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:40:35,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850049382] [2021-07-13 19:40:35,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:40:35,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:35,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:40:35,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:35,819 INFO L87 Difference]: Start difference. First operand 110 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:36,441 INFO L93 Difference]: Finished difference Result 163 states and 313 transitions. [2021-07-13 19:40:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:40:36,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:36,441 INFO L225 Difference]: With dead ends: 163 [2021-07-13 19:40:36,441 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:40:36,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 954.8ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:40:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:40:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2021-07-13 19:40:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-07-13 19:40:36,443 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-07-13 19:40:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:36,443 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-07-13 19:40:36,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-07-13 19:40:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:36,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:36,443 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:36,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2133 [2021-07-13 19:40:36,644 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:36,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1668488457, now seen corresponding path program 200 times [2021-07-13 19:40:36,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:36,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174889688] [2021-07-13 19:40:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:36,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174889688] [2021-07-13 19:40:36,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174889688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244007993] [2021-07-13 19:40:36,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:36,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:36,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:36,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:37,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:37,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:37,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:37,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:37,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,338 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-07-13 19:40:37,338 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-07-13 19:40:37,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:37,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:37,344 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:37,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:37,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:37,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:37,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:37,419 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:40:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:37,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244007993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:37,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:37,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:40:37,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029793271] [2021-07-13 19:40:37,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:40:37,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:37,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:40:37,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:37,538 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,206 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-07-13 19:40:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:40:38,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,207 INFO L225 Difference]: With dead ends: 151 [2021-07-13 19:40:38,207 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:40:38,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 855.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:40:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:40:38,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2021-07-13 19:40:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 109 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 231 transitions. [2021-07-13 19:40:38,209 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 231 transitions. Word has length 18 [2021-07-13 19:40:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,209 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 231 transitions. [2021-07-13 19:40:38,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 231 transitions. [2021-07-13 19:40:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:38,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,209 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-07-13 19:40:38,410 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash 606144853, now seen corresponding path program 201 times [2021-07-13 19:40:38,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263708343] [2021-07-13 19:40:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263708343] [2021-07-13 19:40:38,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263708343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:38,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404289659] [2021-07-13 19:40:38,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:38,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:40:38,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:39,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:40:39,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-07-13 19:40:39,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:39,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:39,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:39,201 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:39,205 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:40:39,210 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:40:39,219 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:39,223 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:40:39,227 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:39,230 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:39,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:40:39,233 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:39,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:39,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:39,261 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:488, output treesize:40 [2021-07-13 19:40:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:39,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404289659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:39,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:39,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:40:39,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738015428] [2021-07-13 19:40:39,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:40:39,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:39,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:40:39,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:39,364 INFO L87 Difference]: Start difference. First operand 110 states and 231 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,081 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-13 19:40:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:41,239 INFO L93 Difference]: Finished difference Result 318 states and 598 transitions. [2021-07-13 19:40:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:40:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:41,240 INFO L225 Difference]: With dead ends: 318 [2021-07-13 19:40:41,240 INFO L226 Difference]: Without dead ends: 277 [2021-07-13 19:40:41,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1855.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:40:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-13 19:40:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 126. [2021-07-13 19:40:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-07-13 19:40:41,243 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-07-13 19:40:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:41,243 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-07-13 19:40:41,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-07-13 19:40:41,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:41,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:41,243 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:41,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2181,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:41,444 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:41,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1130632879, now seen corresponding path program 202 times [2021-07-13 19:40:41,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:41,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775544938] [2021-07-13 19:40:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:41,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:41,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775544938] [2021-07-13 19:40:41,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775544938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:41,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518970130] [2021-07-13 19:40:41,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:41,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:41,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:42,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:42,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:42,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:42,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:40:42,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:42,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:42,038 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:42,042 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:42,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:42,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:42,054 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:42,057 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:42,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:42,060 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:42,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:42,088 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-07-13 19:40:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:42,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518970130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:42,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:42,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:40:42,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734058045] [2021-07-13 19:40:42,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:40:42,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:40:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:42,191 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:42,732 INFO L93 Difference]: Finished difference Result 197 states and 386 transitions. [2021-07-13 19:40:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:40:42,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:42,732 INFO L225 Difference]: With dead ends: 197 [2021-07-13 19:40:42,732 INFO L226 Difference]: Without dead ends: 190 [2021-07-13 19:40:42,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-13 19:40:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 126. [2021-07-13 19:40:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-07-13 19:40:42,734 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-07-13 19:40:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:42,734 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-07-13 19:40:42,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-07-13 19:40:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:42,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:42,734 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:42,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:42,935 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1848177113, now seen corresponding path program 203 times [2021-07-13 19:40:42,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:42,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123105622] [2021-07-13 19:40:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:43,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:43,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123105622] [2021-07-13 19:40:43,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123105622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:43,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289447811] [2021-07-13 19:40:43,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:43,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:40:43,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:43,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:43,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:43,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:43,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:43,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:43,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:43,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:43,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:43,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:43,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:43,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:43,590 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:43,624 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:40:43,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:43,625 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-07-13 19:40:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:43,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289447811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:43,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:43,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:40:43,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372038502] [2021-07-13 19:40:43,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:40:43,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:43,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:40:43,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:43,686 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:44,195 INFO L93 Difference]: Finished difference Result 185 states and 369 transitions. [2021-07-13 19:40:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:40:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:44,196 INFO L225 Difference]: With dead ends: 185 [2021-07-13 19:40:44,196 INFO L226 Difference]: Without dead ends: 178 [2021-07-13 19:40:44,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 812.3ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:40:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-13 19:40:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2021-07-13 19:40:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.2440944881889764) internal successors, (285), 127 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 285 transitions. [2021-07-13 19:40:44,197 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 285 transitions. Word has length 18 [2021-07-13 19:40:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:44,198 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 285 transitions. [2021-07-13 19:40:44,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 285 transitions. [2021-07-13 19:40:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:44,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:44,198 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:44,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2327 [2021-07-13 19:40:44,398 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:44,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1247473947, now seen corresponding path program 204 times [2021-07-13 19:40:44,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:44,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583744944] [2021-07-13 19:40:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:44,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583744944] [2021-07-13 19:40:44,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583744944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647793630] [2021-07-13 19:40:44,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:44,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:44,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:44,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:44,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:44,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:44,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:44,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:45,053 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-07-13 19:40:45,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:45,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:45,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:45,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:45,085 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:45,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:45,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:45,111 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:40:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647793630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:45,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:40:45,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425477276] [2021-07-13 19:40:45,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:40:45,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:40:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:45,178 INFO L87 Difference]: Start difference. First operand 128 states and 285 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:45,488 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-07-13 19:40:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:45,489 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:40:45,489 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 19:40:45,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 19:40:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2021-07-13 19:40:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.25) internal successors, (288), 128 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 288 transitions. [2021-07-13 19:40:45,490 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 288 transitions. Word has length 18 [2021-07-13 19:40:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:45,490 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 288 transitions. [2021-07-13 19:40:45,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 288 transitions. [2021-07-13 19:40:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:45,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:45,491 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:45,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2346 [2021-07-13 19:40:45,691 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash -132376151, now seen corresponding path program 205 times [2021-07-13 19:40:45,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:45,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102332922] [2021-07-13 19:40:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:45,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102332922] [2021-07-13 19:40:45,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102332922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514603541] [2021-07-13 19:40:45,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:46,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:46,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:46,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:46,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:46,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:46,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:46,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:46,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:46,414 INFO L628 ElimStorePlain]: treesize reduction 247, result has 23.5 percent of original size [2021-07-13 19:40:46,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:46,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:46,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:46,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:46,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:46,450 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:46,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:46,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:46,477 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:452, output treesize:41 [2021-07-13 19:40:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514603541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:46,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:40:46,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211967015] [2021-07-13 19:40:46,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:46,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:46,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:46,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:46,536 INFO L87 Difference]: Start difference. First operand 129 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:46,885 INFO L93 Difference]: Finished difference Result 154 states and 330 transitions. [2021-07-13 19:40:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:46,886 INFO L225 Difference]: With dead ends: 154 [2021-07-13 19:40:46,886 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:40:46,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:40:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 130. [2021-07-13 19:40:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.255813953488372) internal successors, (291), 129 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 291 transitions. [2021-07-13 19:40:46,888 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 291 transitions. Word has length 18 [2021-07-13 19:40:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:46,888 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 291 transitions. [2021-07-13 19:40:46,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 291 transitions. [2021-07-13 19:40:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:46,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:46,888 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:47,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2363,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:47,089 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash -789141915, now seen corresponding path program 206 times [2021-07-13 19:40:47,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:47,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190939899] [2021-07-13 19:40:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:47,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:47,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190939899] [2021-07-13 19:40:47,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190939899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:47,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917018184] [2021-07-13 19:40:47,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:47,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:47,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:47,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:47,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:47,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:47,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:47,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:47,592 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:47,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:47,609 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:111, output treesize:41 [2021-07-13 19:40:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:47,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917018184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:47,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:47,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:40:47,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570613471] [2021-07-13 19:40:47,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:40:47,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:47,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:40:47,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:47,670 INFO L87 Difference]: Start difference. First operand 130 states and 291 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:48,022 INFO L93 Difference]: Finished difference Result 156 states and 335 transitions. [2021-07-13 19:40:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:40:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:48,022 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:40:48,022 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:40:48,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 561.6ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:40:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 131. [2021-07-13 19:40:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.2615384615384615) internal successors, (294), 130 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 294 transitions. [2021-07-13 19:40:48,024 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 294 transitions. Word has length 18 [2021-07-13 19:40:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:48,024 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 294 transitions. [2021-07-13 19:40:48,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 294 transitions. [2021-07-13 19:40:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:48,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:48,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:48,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2402 [2021-07-13 19:40:48,225 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -394685911, now seen corresponding path program 207 times [2021-07-13 19:40:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:48,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993118691] [2021-07-13 19:40:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:48,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:48,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993118691] [2021-07-13 19:40:48,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993118691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:48,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706430210] [2021-07-13 19:40:48,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:48,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:48,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:48,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:48,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:48,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:48,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:48,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:40:48,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:48,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:48,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:40:48,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:48,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:48,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:48,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:49,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:49,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:49,013 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:49,019 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:40:49,025 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:40:49,031 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:40:49,036 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:40:49,042 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:49,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:40:49,046 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,125 INFO L628 ElimStorePlain]: treesize reduction 26, result has 74.5 percent of original size [2021-07-13 19:40:49,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:49,128 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:568, output treesize:40 [2021-07-13 19:40:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:49,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706430210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:49,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:49,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:40:49,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059688438] [2021-07-13 19:40:49,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:40:49,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:49,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:40:49,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:49,259 INFO L87 Difference]: Start difference. First operand 131 states and 294 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,082 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-13 19:40:50,269 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-07-13 19:40:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:50,291 INFO L93 Difference]: Finished difference Result 294 states and 604 transitions. [2021-07-13 19:40:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:40:50,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:50,292 INFO L225 Difference]: With dead ends: 294 [2021-07-13 19:40:50,292 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 19:40:50,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1229.1ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:40:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 19:40:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 159. [2021-07-13 19:40:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.411392405063291) internal successors, (381), 158 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 381 transitions. [2021-07-13 19:40:50,295 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 381 transitions. Word has length 18 [2021-07-13 19:40:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:50,295 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 381 transitions. [2021-07-13 19:40:50,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 381 transitions. [2021-07-13 19:40:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:50,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:50,296 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:50,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2413 [2021-07-13 19:40:50,509 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2131463643, now seen corresponding path program 208 times [2021-07-13 19:40:50,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:50,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92199380] [2021-07-13 19:40:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:50,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:50,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92199380] [2021-07-13 19:40:50,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92199380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:50,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992504546] [2021-07-13 19:40:50,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:50,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:50,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:50,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:51,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:51,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:51,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:51,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:51,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,287 INFO L628 ElimStorePlain]: treesize reduction 241, result has 23.7 percent of original size [2021-07-13 19:40:51,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:51,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:51,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:51,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:51,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:51,348 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:448, output treesize:40 [2021-07-13 19:40:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992504546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:51,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:40:51,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433408486] [2021-07-13 19:40:51,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:40:51,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:40:51,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:51,450 INFO L87 Difference]: Start difference. First operand 159 states and 381 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:51,850 INFO L93 Difference]: Finished difference Result 183 states and 419 transitions. [2021-07-13 19:40:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:40:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:51,851 INFO L225 Difference]: With dead ends: 183 [2021-07-13 19:40:51,851 INFO L226 Difference]: Without dead ends: 176 [2021-07-13 19:40:51,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 619.4ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-13 19:40:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2021-07-13 19:40:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.411392405063291) internal successors, (381), 158 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 381 transitions. [2021-07-13 19:40:51,852 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 381 transitions. Word has length 18 [2021-07-13 19:40:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:51,853 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 381 transitions. [2021-07-13 19:40:51,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 381 transitions. [2021-07-13 19:40:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:51,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:51,853 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:52,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2444,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:52,053 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:52,054 INFO L82 PathProgramCache]: Analyzing trace with hash 83301609, now seen corresponding path program 209 times [2021-07-13 19:40:52,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:52,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085619641] [2021-07-13 19:40:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:52,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:52,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085619641] [2021-07-13 19:40:52,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085619641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:52,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326828590] [2021-07-13 19:40:52,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:52,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:52,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:52,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:40:52,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:52,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:40:52,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:52,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:52,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:52,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:52,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:52,767 INFO L628 ElimStorePlain]: treesize reduction 251, result has 23.2 percent of original size [2021-07-13 19:40:52,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:52,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:52,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:52,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:52,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:52,799 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:52,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:52,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:52,825 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:40:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:52,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326828590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:52,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:52,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:40:52,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645465603] [2021-07-13 19:40:52,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:40:52,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:40:52,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:52,892 INFO L87 Difference]: Start difference. First operand 159 states and 381 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:53,264 INFO L93 Difference]: Finished difference Result 195 states and 436 transitions. [2021-07-13 19:40:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:40:53,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:53,265 INFO L225 Difference]: With dead ends: 195 [2021-07-13 19:40:53,265 INFO L226 Difference]: Without dead ends: 188 [2021-07-13 19:40:53,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-13 19:40:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 159. [2021-07-13 19:40:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.411392405063291) internal successors, (381), 158 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 381 transitions. [2021-07-13 19:40:53,267 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 381 transitions. Word has length 18 [2021-07-13 19:40:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:53,267 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 381 transitions. [2021-07-13 19:40:53,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 381 transitions. [2021-07-13 19:40:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:53,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:53,267 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:53,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2483,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:53,468 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash -573464155, now seen corresponding path program 210 times [2021-07-13 19:40:53,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:53,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659017545] [2021-07-13 19:40:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:53,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:53,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659017545] [2021-07-13 19:40:53,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659017545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:53,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323708372] [2021-07-13 19:40:53,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:53,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:40:53,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:53,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:53,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:54,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:54,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:40:54,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:40:54,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:40:54,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:40:54,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:54,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:54,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:40:54,197 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:54,202 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:40:54,206 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:40:54,211 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:54,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:40:54,215 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:54,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:54,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:54,250 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:572, output treesize:41 [2021-07-13 19:40:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:54,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323708372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:54,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:54,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:40:54,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536577751] [2021-07-13 19:40:54,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:40:54,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:54,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:40:54,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:54,313 INFO L87 Difference]: Start difference. First operand 159 states and 381 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:55,063 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-07-13 19:40:55,309 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-07-13 19:40:55,684 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 19:40:55,814 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-13 19:40:56,020 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-13 19:40:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:56,044 INFO L93 Difference]: Finished difference Result 291 states and 613 transitions. [2021-07-13 19:40:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:40:56,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:56,045 INFO L225 Difference]: With dead ends: 291 [2021-07-13 19:40:56,045 INFO L226 Difference]: Without dead ends: 278 [2021-07-13 19:40:56,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1756.1ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:40:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-13 19:40:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 157. [2021-07-13 19:40:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.3846153846153846) internal successors, (372), 156 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 372 transitions. [2021-07-13 19:40:56,047 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 372 transitions. Word has length 18 [2021-07-13 19:40:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:56,047 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 372 transitions. [2021-07-13 19:40:56,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 372 transitions. [2021-07-13 19:40:56,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:56,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:56,047 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:56,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:56,248 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:56,248 INFO L82 PathProgramCache]: Analyzing trace with hash -179008151, now seen corresponding path program 211 times [2021-07-13 19:40:56,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:56,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251006335] [2021-07-13 19:40:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:56,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251006335] [2021-07-13 19:40:56,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251006335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855653424] [2021-07-13 19:40:56,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:56,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:56,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:56,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:56,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:56,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:56,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:56,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:40:56,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:56,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:56,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:56,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,820 INFO L628 ElimStorePlain]: treesize reduction 240, result has 22.6 percent of original size [2021-07-13 19:40:56,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:56,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:56,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:56,853 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:56,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:56,880 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:40:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855653424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:56,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:40:56,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660547484] [2021-07-13 19:40:56,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:40:56,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:40:56,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:56,972 INFO L87 Difference]: Start difference. First operand 157 states and 372 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:57,500 INFO L93 Difference]: Finished difference Result 207 states and 444 transitions. [2021-07-13 19:40:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:40:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:57,501 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:40:57,501 INFO L226 Difference]: Without dead ends: 197 [2021-07-13 19:40:57,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 612.0ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:40:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-13 19:40:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2021-07-13 19:40:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.378205128205128) internal successors, (371), 156 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 371 transitions. [2021-07-13 19:40:57,503 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 371 transitions. Word has length 18 [2021-07-13 19:40:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:57,503 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 371 transitions. [2021-07-13 19:40:57,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 371 transitions. [2021-07-13 19:40:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:57,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:57,504 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:57,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2538,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:57,717 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:57,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1915785883, now seen corresponding path program 212 times [2021-07-13 19:40:57,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:57,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312819162] [2021-07-13 19:40:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:57,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:57,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312819162] [2021-07-13 19:40:57,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312819162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:57,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547315028] [2021-07-13 19:40:57,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:57,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:57,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:40:57,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:58,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:40:58,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:40:58,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:40:58,252 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:40:58,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,359 INFO L628 ElimStorePlain]: treesize reduction 260, result has 21.2 percent of original size [2021-07-13 19:40:58,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:58,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:58,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:58,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:58,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:58,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:58,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:58,421 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:40:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:58,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547315028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:58,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:58,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:40:58,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049782824] [2021-07-13 19:40:58,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:40:58,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:58,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:40:58,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:40:58,523 INFO L87 Difference]: Start difference. First operand 157 states and 371 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:59,104 INFO L93 Difference]: Finished difference Result 195 states and 428 transitions. [2021-07-13 19:40:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:40:59,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:40:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:59,105 INFO L225 Difference]: With dead ends: 195 [2021-07-13 19:40:59,105 INFO L226 Difference]: Without dead ends: 188 [2021-07-13 19:40:59,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 718.0ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-13 19:40:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2021-07-13 19:40:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.3741935483870966) internal successors, (368), 155 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 368 transitions. [2021-07-13 19:40:59,107 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 368 transitions. Word has length 18 [2021-07-13 19:40:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:59,107 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 368 transitions. [2021-07-13 19:40:59,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 368 transitions. [2021-07-13 19:40:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:40:59,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:59,107 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:59,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2562 [2021-07-13 19:40:59,308 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:59,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:59,308 INFO L82 PathProgramCache]: Analyzing trace with hash 403324517, now seen corresponding path program 213 times [2021-07-13 19:40:59,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:59,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490536320] [2021-07-13 19:40:59,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:59,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:59,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490536320] [2021-07-13 19:40:59,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490536320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:59,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006592335] [2021-07-13 19:40:59,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:59,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:59,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:00,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:00,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:00,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:00,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:00,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:00,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:00,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:00,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:00,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:00,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:00,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:00,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:00,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:00,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:00,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:00,211 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-07-13 19:41:00,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:00,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:00,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:00,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:00,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:00,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:00,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:00,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:00,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:00,272 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:41:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:00,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006592335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:00,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:00,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:41:00,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71727834] [2021-07-13 19:41:00,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:00,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:00,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:00,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:00,339 INFO L87 Difference]: Start difference. First operand 156 states and 368 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:01,169 INFO L93 Difference]: Finished difference Result 279 states and 591 transitions. [2021-07-13 19:41:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:41:01,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:01,170 INFO L225 Difference]: With dead ends: 279 [2021-07-13 19:41:01,170 INFO L226 Difference]: Without dead ends: 265 [2021-07-13 19:41:01,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1149.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:41:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-13 19:41:01,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 166. [2021-07-13 19:41:01,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.4363636363636365) internal successors, (402), 165 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 402 transitions. [2021-07-13 19:41:01,172 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 402 transitions. Word has length 18 [2021-07-13 19:41:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:01,172 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 402 transitions. [2021-07-13 19:41:01,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 402 transitions. [2021-07-13 19:41:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:01,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:01,172 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:01,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-07-13 19:41:01,373 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:01,373 INFO L82 PathProgramCache]: Analyzing trace with hash 797780521, now seen corresponding path program 214 times [2021-07-13 19:41:01,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:01,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399384283] [2021-07-13 19:41:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:01,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:01,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399384283] [2021-07-13 19:41:01,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399384283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:01,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155097081] [2021-07-13 19:41:01,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:01,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:01,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:01,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:01,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:01,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:01,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:01,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:01,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,925 INFO L628 ElimStorePlain]: treesize reduction 235, result has 24.2 percent of original size [2021-07-13 19:41:01,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:01,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:01,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:01,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:01,961 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:01,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:01,988 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:439, output treesize:40 [2021-07-13 19:41:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:02,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155097081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:02,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:02,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:41:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188190962] [2021-07-13 19:41:02,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:41:02,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:41:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:02,086 INFO L87 Difference]: Start difference. First operand 166 states and 402 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:02,415 INFO L93 Difference]: Finished difference Result 245 states and 530 transitions. [2021-07-13 19:41:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:02,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:02,416 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:41:02,416 INFO L226 Difference]: Without dead ends: 235 [2021-07-13 19:41:02,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:02,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-13 19:41:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 168. [2021-07-13 19:41:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4491017964071857) internal successors, (409), 167 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 409 transitions. [2021-07-13 19:41:02,418 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 409 transitions. Word has length 18 [2021-07-13 19:41:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:02,418 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 409 transitions. [2021-07-13 19:41:02,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 409 transitions. [2021-07-13 19:41:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:02,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:02,418 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:02,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2613 [2021-07-13 19:41:02,619 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:02,619 INFO L82 PathProgramCache]: Analyzing trace with hash -938997211, now seen corresponding path program 215 times [2021-07-13 19:41:02,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:02,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084327225] [2021-07-13 19:41:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:02,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:02,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084327225] [2021-07-13 19:41:02,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084327225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:02,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727956221] [2021-07-13 19:41:02,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:02,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:41:02,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:02,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:03,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:03,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:03,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:03,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:03,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:03,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,123 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:41:03,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:03,124 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-07-13 19:41:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727956221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:03,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:41:03,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334092787] [2021-07-13 19:41:03,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:03,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:03,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:03,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:03,224 INFO L87 Difference]: Start difference. First operand 168 states and 409 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:03,596 INFO L93 Difference]: Finished difference Result 230 states and 506 transitions. [2021-07-13 19:41:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:03,596 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:03,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:03,597 INFO L225 Difference]: With dead ends: 230 [2021-07-13 19:41:03,597 INFO L226 Difference]: Without dead ends: 223 [2021-07-13 19:41:03,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 537.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:41:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-13 19:41:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-07-13 19:41:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4397590361445785) internal successors, (405), 166 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 405 transitions. [2021-07-13 19:41:03,599 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 405 transitions. Word has length 18 [2021-07-13 19:41:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:03,599 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 405 transitions. [2021-07-13 19:41:03,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 405 transitions. [2021-07-13 19:41:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:03,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:03,599 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:03,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2640 [2021-07-13 19:41:03,800 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1335636099, now seen corresponding path program 216 times [2021-07-13 19:41:03,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:03,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298070888] [2021-07-13 19:41:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:41:03,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:03,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298070888] [2021-07-13 19:41:03,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298070888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499709402] [2021-07-13 19:41:03,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:03,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:03,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:03,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:03,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:04,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:04,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:04,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:04,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:04,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:04,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:04,154 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:04,156 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:04,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:04,174 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:176, output treesize:40 [2021-07-13 19:41:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:04,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499709402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:04,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:04,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:41:04,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083323081] [2021-07-13 19:41:04,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:04,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:04,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:04,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:04,275 INFO L87 Difference]: Start difference. First operand 167 states and 405 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:04,854 INFO L93 Difference]: Finished difference Result 209 states and 469 transitions. [2021-07-13 19:41:04,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:41:04,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:04,855 INFO L225 Difference]: With dead ends: 209 [2021-07-13 19:41:04,855 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 19:41:04,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 638.5ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:41:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 19:41:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 167. [2021-07-13 19:41:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.433734939759036) internal successors, (404), 166 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 404 transitions. [2021-07-13 19:41:04,858 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 404 transitions. Word has length 18 [2021-07-13 19:41:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:04,858 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 404 transitions. [2021-07-13 19:41:04,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 404 transitions. [2021-07-13 19:41:04,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:04,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:04,858 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:05,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2651 [2021-07-13 19:41:05,058 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:05,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:05,059 INFO L82 PathProgramCache]: Analyzing trace with hash -401141633, now seen corresponding path program 217 times [2021-07-13 19:41:05,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:05,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106904084] [2021-07-13 19:41:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:41:05,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:05,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106904084] [2021-07-13 19:41:05,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106904084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984059689] [2021-07-13 19:41:05,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:05,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:05,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:05,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:05,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:05,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:05,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:05,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:05,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:05,634 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:05,639 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:05,642 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:05,649 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:05,653 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:05,657 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:05,661 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:05,665 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:05,669 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:05,673 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:05,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:05,676 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:05,729 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2021-07-13 19:41:05,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:05,734 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-07-13 19:41:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:05,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984059689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:05,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:41:05,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876213039] [2021-07-13 19:41:05,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:41:05,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:05,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:41:05,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:05,833 INFO L87 Difference]: Start difference. First operand 167 states and 404 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:06,383 INFO L93 Difference]: Finished difference Result 211 states and 471 transitions. [2021-07-13 19:41:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:41:06,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:06,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:06,383 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:41:06,383 INFO L226 Difference]: Without dead ends: 204 [2021-07-13 19:41:06,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-13 19:41:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 167. [2021-07-13 19:41:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.433734939759036) internal successors, (404), 166 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 404 transitions. [2021-07-13 19:41:06,386 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 404 transitions. Word has length 18 [2021-07-13 19:41:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:06,386 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 404 transitions. [2021-07-13 19:41:06,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 404 transitions. [2021-07-13 19:41:06,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:06,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:06,386 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:06,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2661 [2021-07-13 19:41:06,587 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:06,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:06,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1717298937, now seen corresponding path program 218 times [2021-07-13 19:41:06,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:06,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806919374] [2021-07-13 19:41:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:41:06,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:06,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806919374] [2021-07-13 19:41:06,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806919374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:06,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806483149] [2021-07-13 19:41:06,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:06,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:06,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:06,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:06,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:07,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:07,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:07,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:07,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:07,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:07,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:07,178 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:07,182 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:07,186 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:07,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:07,189 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:07,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:07,215 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:343, output treesize:41 [2021-07-13 19:41:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:07,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806483149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:07,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:07,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:41:07,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532453718] [2021-07-13 19:41:07,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:41:07,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:41:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:07,284 INFO L87 Difference]: Start difference. First operand 167 states and 404 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:07,827 INFO L93 Difference]: Finished difference Result 202 states and 459 transitions. [2021-07-13 19:41:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:07,828 INFO L225 Difference]: With dead ends: 202 [2021-07-13 19:41:07,828 INFO L226 Difference]: Without dead ends: 195 [2021-07-13 19:41:07,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 743.7ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-13 19:41:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 167. [2021-07-13 19:41:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.433734939759036) internal successors, (404), 166 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 404 transitions. [2021-07-13 19:41:07,830 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 404 transitions. Word has length 18 [2021-07-13 19:41:07,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:07,830 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 404 transitions. [2021-07-13 19:41:07,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,830 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 404 transitions. [2021-07-13 19:41:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:07,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:07,831 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:08,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2733,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:08,033 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash 829289833, now seen corresponding path program 219 times [2021-07-13 19:41:08,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:08,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902889365] [2021-07-13 19:41:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:08,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:08,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902889365] [2021-07-13 19:41:08,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902889365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:08,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842682886] [2021-07-13 19:41:08,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:08,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:08,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:41:08,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:08,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:08,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:08,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:08,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:08,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:08,656 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:08,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:08,670 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:08,674 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:08,678 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:08,682 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:08,686 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:08,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:08,689 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:08,743 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2021-07-13 19:41:08,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:08,744 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-07-13 19:41:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:08,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842682886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:08,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:08,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:41:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908337275] [2021-07-13 19:41:08,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:08,848 INFO L87 Difference]: Start difference. First operand 167 states and 404 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:09,944 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-13 19:41:10,221 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-13 19:41:10,725 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-07-13 19:41:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:10,772 INFO L93 Difference]: Finished difference Result 332 states and 688 transitions. [2021-07-13 19:41:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:41:10,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:10,773 INFO L225 Difference]: With dead ends: 332 [2021-07-13 19:41:10,773 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 19:41:10,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2039.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:41:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 19:41:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 167. [2021-07-13 19:41:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4156626506024095) internal successors, (401), 166 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 401 transitions. [2021-07-13 19:41:10,776 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 401 transitions. Word has length 18 [2021-07-13 19:41:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:10,776 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 401 transitions. [2021-07-13 19:41:10,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 401 transitions. [2021-07-13 19:41:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:10,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:10,777 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:11,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2784 [2021-07-13 19:41:11,001 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash -907487899, now seen corresponding path program 220 times [2021-07-13 19:41:11,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:11,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690038262] [2021-07-13 19:41:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:11,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:11,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690038262] [2021-07-13 19:41:11,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690038262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:11,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191965571] [2021-07-13 19:41:11,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:11,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:11,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:11,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:11,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:11,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:11,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:11,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:11,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:11,525 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:11,530 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:11,534 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:11,538 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:11,542 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:11,546 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:11,550 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:11,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:11,553 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:11,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:11,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:11,580 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-07-13 19:41:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:11,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191965571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:11,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:11,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:41:11,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683817065] [2021-07-13 19:41:11,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:41:11,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:11,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:41:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:11,681 INFO L87 Difference]: Start difference. First operand 167 states and 401 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:12,171 INFO L93 Difference]: Finished difference Result 213 states and 467 transitions. [2021-07-13 19:41:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:12,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:12,172 INFO L225 Difference]: With dead ends: 213 [2021-07-13 19:41:12,172 INFO L226 Difference]: Without dead ends: 206 [2021-07-13 19:41:12,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-13 19:41:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 167. [2021-07-13 19:41:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4156626506024095) internal successors, (401), 166 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 401 transitions. [2021-07-13 19:41:12,174 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 401 transitions. Word has length 18 [2021-07-13 19:41:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:12,174 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 401 transitions. [2021-07-13 19:41:12,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 401 transitions. [2021-07-13 19:41:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:12,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:12,174 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:12,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2823,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:12,375 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:12,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2071322093, now seen corresponding path program 221 times [2021-07-13 19:41:12,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:12,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595961350] [2021-07-13 19:41:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:12,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:12,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595961350] [2021-07-13 19:41:12,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595961350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:12,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455106252] [2021-07-13 19:41:12,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:12,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:12,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:12,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:12,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:12,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:12,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:12,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:12,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:12,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:12,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:12,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:12,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:12,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:12,926 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:41 [2021-07-13 19:41:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:12,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455106252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:12,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:12,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:41:12,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613657228] [2021-07-13 19:41:12,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:12,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:12,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:12,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:12,995 INFO L87 Difference]: Start difference. First operand 167 states and 401 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:13,541 INFO L93 Difference]: Finished difference Result 201 states and 450 transitions. [2021-07-13 19:41:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:41:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:13,541 INFO L225 Difference]: With dead ends: 201 [2021-07-13 19:41:13,541 INFO L226 Difference]: Without dead ends: 194 [2021-07-13 19:41:13,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 779.0ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:41:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-13 19:41:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 167. [2021-07-13 19:41:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4156626506024095) internal successors, (401), 166 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 401 transitions. [2021-07-13 19:41:13,543 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 401 transitions. Word has length 18 [2021-07-13 19:41:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:13,543 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 401 transitions. [2021-07-13 19:41:13,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 401 transitions. [2021-07-13 19:41:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:13,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:13,544 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:13,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2872 [2021-07-13 19:41:13,744 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash -74848667, now seen corresponding path program 222 times [2021-07-13 19:41:13,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:13,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793320675] [2021-07-13 19:41:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:13,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:13,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793320675] [2021-07-13 19:41:13,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793320675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:13,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352901120] [2021-07-13 19:41:13,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:14,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:41:14,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:14,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:14,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:14,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:41:14,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:14,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:14,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:14,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:14,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:14,392 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:14,396 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:14,400 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:14,404 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:41:14,408 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:14,412 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:14,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:14,416 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,467 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-07-13 19:41:14,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:14,469 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-07-13 19:41:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:14,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352901120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:14,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:14,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:41:14,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132303809] [2021-07-13 19:41:14,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:41:14,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:41:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:14,536 INFO L87 Difference]: Start difference. First operand 167 states and 401 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:14,832 INFO L93 Difference]: Finished difference Result 197 states and 444 transitions. [2021-07-13 19:41:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:14,833 INFO L225 Difference]: With dead ends: 197 [2021-07-13 19:41:14,833 INFO L226 Difference]: Without dead ends: 190 [2021-07-13 19:41:14,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-13 19:41:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2021-07-13 19:41:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4156626506024095) internal successors, (401), 166 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 401 transitions. [2021-07-13 19:41:14,835 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 401 transitions. Word has length 18 [2021-07-13 19:41:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:14,835 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 401 transitions. [2021-07-13 19:41:14,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 401 transitions. [2021-07-13 19:41:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:14,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:14,836 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:15,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2883 [2021-07-13 19:41:15,036 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1795842231, now seen corresponding path program 223 times [2021-07-13 19:41:15,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:15,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009184429] [2021-07-13 19:41:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:15,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:15,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009184429] [2021-07-13 19:41:15,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009184429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:15,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460777158] [2021-07-13 19:41:15,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:15,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:15,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:15,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:15,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:15,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:15,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:15,470 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:15,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:15,476 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:15,479 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:15,482 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:15,484 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:15,488 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:15,490 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:15,493 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:15,531 INFO L628 ElimStorePlain]: treesize reduction 51, result has 44.6 percent of original size [2021-07-13 19:41:15,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:15,531 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:364, output treesize:41 [2021-07-13 19:41:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:15,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460777158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:15,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:15,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:41:15,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143784414] [2021-07-13 19:41:15,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:15,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:15,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:15,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:15,588 INFO L87 Difference]: Start difference. First operand 167 states and 401 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:15,832 INFO L93 Difference]: Finished difference Result 190 states and 440 transitions. [2021-07-13 19:41:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:15,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:15,833 INFO L225 Difference]: With dead ends: 190 [2021-07-13 19:41:15,833 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 19:41:15,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 19:41:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2021-07-13 19:41:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.4166666666666665) internal successors, (406), 168 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 406 transitions. [2021-07-13 19:41:15,835 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 406 transitions. Word has length 18 [2021-07-13 19:41:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:15,835 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 406 transitions. [2021-07-13 19:41:15,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 406 transitions. [2021-07-13 19:41:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:15,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:15,836 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:16,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2941 [2021-07-13 19:41:16,036 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:16,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1384027269, now seen corresponding path program 224 times [2021-07-13 19:41:16,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:16,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102295423] [2021-07-13 19:41:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:16,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:16,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102295423] [2021-07-13 19:41:16,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102295423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:16,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65080234] [2021-07-13 19:41:16,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:16,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:16,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:16,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:16,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:16,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:16,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:16,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:16,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:16,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:16,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:16,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:16,578 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:149, output treesize:41 [2021-07-13 19:41:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:16,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65080234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:16,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:16,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:41:16,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901549182] [2021-07-13 19:41:16,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:41:16,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:16,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:41:16,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:16,624 INFO L87 Difference]: Start difference. First operand 169 states and 406 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:16,905 INFO L93 Difference]: Finished difference Result 194 states and 448 transitions. [2021-07-13 19:41:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:16,905 INFO L225 Difference]: With dead ends: 194 [2021-07-13 19:41:16,905 INFO L226 Difference]: Without dead ends: 187 [2021-07-13 19:41:16,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 524.1ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-13 19:41:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-07-13 19:41:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.4201183431952664) internal successors, (409), 169 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 409 transitions. [2021-07-13 19:41:16,907 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 409 transitions. Word has length 18 [2021-07-13 19:41:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:16,907 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 409 transitions. [2021-07-13 19:41:16,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 409 transitions. [2021-07-13 19:41:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:16,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:16,908 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:17,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2956,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:17,108 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2040793033, now seen corresponding path program 225 times [2021-07-13 19:41:17,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:17,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774993265] [2021-07-13 19:41:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:17,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:17,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774993265] [2021-07-13 19:41:17,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774993265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:17,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951908922] [2021-07-13 19:41:17,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:17,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:17,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:17,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:17,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:18,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:41:18,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:18,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:41:18,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:41:18,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:18,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:41:18,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:18,050 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-07-13 19:41:18,054 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:18,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:41:18,057 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:18,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:18,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:18,082 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:355, output treesize:41 [2021-07-13 19:41:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:18,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951908922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:18,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:18,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:41:18,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408311874] [2021-07-13 19:41:18,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:18,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:18,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:18,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:18,153 INFO L87 Difference]: Start difference. First operand 170 states and 409 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:19,016 INFO L93 Difference]: Finished difference Result 301 states and 643 transitions. [2021-07-13 19:41:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:41:19,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:19,017 INFO L225 Difference]: With dead ends: 301 [2021-07-13 19:41:19,017 INFO L226 Difference]: Without dead ends: 288 [2021-07-13 19:41:19,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1327.6ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:41:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-13 19:41:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 186. [2021-07-13 19:41:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.4486486486486485) internal successors, (453), 185 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 453 transitions. [2021-07-13 19:41:19,019 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 453 transitions. Word has length 18 [2021-07-13 19:41:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:19,019 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 453 transitions. [2021-07-13 19:41:19,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 453 transitions. [2021-07-13 19:41:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:19,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:19,020 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:19,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2971,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:19,225 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1646337029, now seen corresponding path program 226 times [2021-07-13 19:41:19,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:19,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754367833] [2021-07-13 19:41:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754367833] [2021-07-13 19:41:19,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754367833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35256063] [2021-07-13 19:41:19,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:19,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:19,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:19,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:19,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:19,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:19,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:19,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:19,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,843 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-07-13 19:41:19,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:19,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:19,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:19,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:19,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:19,906 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:41:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35256063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:19,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:41:19,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149785079] [2021-07-13 19:41:19,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:19,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:19,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:19,999 INFO L87 Difference]: Start difference. First operand 186 states and 453 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:20,377 INFO L93 Difference]: Finished difference Result 224 states and 512 transitions. [2021-07-13 19:41:20,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:20,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:20,378 INFO L225 Difference]: With dead ends: 224 [2021-07-13 19:41:20,378 INFO L226 Difference]: Without dead ends: 214 [2021-07-13 19:41:20,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-13 19:41:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 187. [2021-07-13 19:41:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.4516129032258065) internal successors, (456), 186 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 456 transitions. [2021-07-13 19:41:20,380 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 456 transitions. Word has length 18 [2021-07-13 19:41:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:20,381 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 456 transitions. [2021-07-13 19:41:20,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 456 transitions. [2021-07-13 19:41:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:20,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:20,381 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:20,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:20,581 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 911852535, now seen corresponding path program 227 times [2021-07-13 19:41:20,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:20,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517058491] [2021-07-13 19:41:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:20,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:20,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517058491] [2021-07-13 19:41:20,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517058491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:20,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450871448] [2021-07-13 19:41:20,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:20,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:20,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:20,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:21,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:21,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:21,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:21,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:21,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:21,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:21,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:21,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:21,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:21,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:21,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:21,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:21,211 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:115, output treesize:40 [2021-07-13 19:41:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:21,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450871448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:21,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:21,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:41:21,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964590176] [2021-07-13 19:41:21,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:21,281 INFO L87 Difference]: Start difference. First operand 187 states and 456 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:21,701 INFO L93 Difference]: Finished difference Result 212 states and 496 transitions. [2021-07-13 19:41:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:41:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:21,701 INFO L225 Difference]: With dead ends: 212 [2021-07-13 19:41:21,701 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:41:21,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 759.5ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:41:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 187. [2021-07-13 19:41:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.4516129032258065) internal successors, (456), 186 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 456 transitions. [2021-07-13 19:41:21,703 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 456 transitions. Word has length 18 [2021-07-13 19:41:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:21,703 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 456 transitions. [2021-07-13 19:41:21,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 456 transitions. [2021-07-13 19:41:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:21,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:21,704 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:21,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:21,904 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash 99107669, now seen corresponding path program 228 times [2021-07-13 19:41:21,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:21,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791437091] [2021-07-13 19:41:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:22,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:22,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791437091] [2021-07-13 19:41:22,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791437091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:22,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430225003] [2021-07-13 19:41:22,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:22,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:22,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:22,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:22,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:22,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:22,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:22,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:22,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:22,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:22,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:22,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:22,392 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-07-13 19:41:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:22,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430225003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:22,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:22,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:41:22,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768997449] [2021-07-13 19:41:22,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:22,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:22,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:22,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:22,450 INFO L87 Difference]: Start difference. First operand 187 states and 456 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:22,756 INFO L93 Difference]: Finished difference Result 207 states and 490 transitions. [2021-07-13 19:41:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:22,756 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:41:22,757 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:41:22,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 545.0ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:41:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 189. [2021-07-13 19:41:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.452127659574468) internal successors, (461), 188 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 461 transitions. [2021-07-13 19:41:22,759 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 461 transitions. Word has length 18 [2021-07-13 19:41:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:22,759 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 461 transitions. [2021-07-13 19:41:22,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 461 transitions. [2021-07-13 19:41:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:22,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:22,759 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:22,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-07-13 19:41:22,960 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash -557658095, now seen corresponding path program 229 times [2021-07-13 19:41:22,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:22,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284050250] [2021-07-13 19:41:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:23,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:23,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284050250] [2021-07-13 19:41:23,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284050250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:23,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651226780] [2021-07-13 19:41:23,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:23,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:23,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:23,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:23,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:23,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:23,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:23,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:23,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,632 INFO L628 ElimStorePlain]: treesize reduction 265, result has 22.7 percent of original size [2021-07-13 19:41:23,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:23,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:23,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:23,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:23,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:23,689 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:41:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:23,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651226780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:23,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:23,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:41:23,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55888384] [2021-07-13 19:41:23,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:23,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:23,757 INFO L87 Difference]: Start difference. First operand 189 states and 461 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:24,213 INFO L93 Difference]: Finished difference Result 211 states and 498 transitions. [2021-07-13 19:41:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:24,213 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:24,214 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:41:24,214 INFO L226 Difference]: Without dead ends: 204 [2021-07-13 19:41:24,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 686.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:24,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-13 19:41:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 190. [2021-07-13 19:41:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.455026455026455) internal successors, (464), 189 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 464 transitions. [2021-07-13 19:41:24,216 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 464 transitions. Word has length 18 [2021-07-13 19:41:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:24,216 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 464 transitions. [2021-07-13 19:41:24,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 464 transitions. [2021-07-13 19:41:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:24,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:24,216 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:24,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-07-13 19:41:24,417 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:24,417 INFO L82 PathProgramCache]: Analyzing trace with hash -163202091, now seen corresponding path program 230 times [2021-07-13 19:41:24,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:24,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363856351] [2021-07-13 19:41:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:24,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363856351] [2021-07-13 19:41:24,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363856351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625845409] [2021-07-13 19:41:24,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:24,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:24,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:24,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:24,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:25,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:25,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:25,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:25,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:25,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:25,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:25,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:25,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:25,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:25,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:25,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:25,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:25,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:25,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:25,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:25,127 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:41:25,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:25,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:25,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:25,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:25,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:25,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:25,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:25,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:25,190 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:41:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:25,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625845409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:25,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:25,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:41:25,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697122464] [2021-07-13 19:41:25,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:41:25,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:25,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:41:25,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:25,297 INFO L87 Difference]: Start difference. First operand 190 states and 464 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:25,722 INFO L93 Difference]: Finished difference Result 224 states and 516 transitions. [2021-07-13 19:41:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:25,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:25,723 INFO L225 Difference]: With dead ends: 224 [2021-07-13 19:41:25,723 INFO L226 Difference]: Without dead ends: 214 [2021-07-13 19:41:25,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 773.2ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:41:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-13 19:41:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2021-07-13 19:41:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.457894736842105) internal successors, (467), 190 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 467 transitions. [2021-07-13 19:41:25,726 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 467 transitions. Word has length 18 [2021-07-13 19:41:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:25,726 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 467 transitions. [2021-07-13 19:41:25,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 467 transitions. [2021-07-13 19:41:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:25,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:25,727 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:25,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-07-13 19:41:25,947 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1899979823, now seen corresponding path program 231 times [2021-07-13 19:41:25,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:25,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834837779] [2021-07-13 19:41:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:26,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:26,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834837779] [2021-07-13 19:41:26,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834837779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:26,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367244851] [2021-07-13 19:41:26,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:26,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:26,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:26,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:26,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:26,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:26,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:26,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:26,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:26,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:26,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:26,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:26,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:26,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:26,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:26,540 INFO L628 ElimStorePlain]: treesize reduction 162, result has 31.6 percent of original size [2021-07-13 19:41:26,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:26,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:26,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:26,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:26,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:26,575 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:26,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:26,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:26,602 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-07-13 19:41:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:26,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367244851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:26,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:26,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:41:26,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806588953] [2021-07-13 19:41:26,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:41:26,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:26,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:41:26,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:26,702 INFO L87 Difference]: Start difference. First operand 191 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:27,176 INFO L93 Difference]: Finished difference Result 212 states and 500 transitions. [2021-07-13 19:41:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:41:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:27,176 INFO L225 Difference]: With dead ends: 212 [2021-07-13 19:41:27,176 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:41:27,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:41:27,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:41:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 190. [2021-07-13 19:41:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.455026455026455) internal successors, (464), 189 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 464 transitions. [2021-07-13 19:41:27,178 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 464 transitions. Word has length 18 [2021-07-13 19:41:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:27,179 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 464 transitions. [2021-07-13 19:41:27,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 464 transitions. [2021-07-13 19:41:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:27,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:27,179 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:27,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3108,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:27,379 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:27,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:27,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1064004361, now seen corresponding path program 232 times [2021-07-13 19:41:27,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:27,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497426838] [2021-07-13 19:41:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:27,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497426838] [2021-07-13 19:41:27,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497426838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757264809] [2021-07-13 19:41:27,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:27,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:27,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:27,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:27,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:27,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:27,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:27,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:27,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:27,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:27,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:27,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:27,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:28,015 INFO L628 ElimStorePlain]: treesize reduction 255, result has 22.3 percent of original size [2021-07-13 19:41:28,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:28,019 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:28,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:28,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:28,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:28,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:28,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:28,071 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:41:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:28,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757264809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:28,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:28,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:41:28,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522672486] [2021-07-13 19:41:28,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:41:28,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:41:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:28,135 INFO L87 Difference]: Start difference. First operand 190 states and 464 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:28,772 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-07-13 19:41:28,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:28,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:28,773 INFO L225 Difference]: With dead ends: 244 [2021-07-13 19:41:28,773 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:41:28,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 782.7ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:41:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2021-07-13 19:41:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.475) internal successors, (495), 200 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 495 transitions. [2021-07-13 19:41:28,775 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 495 transitions. Word has length 18 [2021-07-13 19:41:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:28,775 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 495 transitions. [2021-07-13 19:41:28,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 495 transitions. [2021-07-13 19:41:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:28,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:28,776 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:28,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:28,976 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:28,977 INFO L82 PathProgramCache]: Analyzing trace with hash -669548357, now seen corresponding path program 233 times [2021-07-13 19:41:28,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:28,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939701022] [2021-07-13 19:41:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:29,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939701022] [2021-07-13 19:41:29,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939701022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285809087] [2021-07-13 19:41:29,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:29,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:29,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:29,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:29,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:29,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:29,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:29,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:29,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,573 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:41:29,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:29,574 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-07-13 19:41:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285809087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:29,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:41:29,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911268307] [2021-07-13 19:41:29,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:29,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:29,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:29,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:29,681 INFO L87 Difference]: Start difference. First operand 201 states and 495 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:30,188 INFO L93 Difference]: Finished difference Result 244 states and 559 transitions. [2021-07-13 19:41:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:41:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:30,189 INFO L225 Difference]: With dead ends: 244 [2021-07-13 19:41:30,189 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:41:30,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 785.0ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:41:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:41:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2021-07-13 19:41:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.475) internal successors, (495), 200 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 495 transitions. [2021-07-13 19:41:30,192 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 495 transitions. Word has length 18 [2021-07-13 19:41:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:30,192 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 495 transitions. [2021-07-13 19:41:30,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 495 transitions. [2021-07-13 19:41:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:30,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:30,192 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:30,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3159,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:30,393 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1888641207, now seen corresponding path program 234 times [2021-07-13 19:41:30,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:30,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556848182] [2021-07-13 19:41:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:30,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556848182] [2021-07-13 19:41:30,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556848182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708744087] [2021-07-13 19:41:30,624 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:30,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:41:30,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:30,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:30,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:30,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:30,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:30,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:30,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:30,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:30,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:30,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:30,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:30,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:30,891 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-07-13 19:41:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708744087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:31,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:41:31,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160891995] [2021-07-13 19:41:31,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:31,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:31,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:31,003 INFO L87 Difference]: Start difference. First operand 201 states and 495 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:31,537 INFO L93 Difference]: Finished difference Result 232 states and 541 transitions. [2021-07-13 19:41:31,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:41:31,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:31,538 INFO L225 Difference]: With dead ends: 232 [2021-07-13 19:41:31,538 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:41:31,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 764.1ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:41:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:41:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2021-07-13 19:41:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.475) internal successors, (495), 200 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 495 transitions. [2021-07-13 19:41:31,540 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 495 transitions. Word has length 18 [2021-07-13 19:41:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:31,540 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 495 transitions. [2021-07-13 19:41:31,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 495 transitions. [2021-07-13 19:41:31,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:31,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:31,540 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:31,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:31,741 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash -131692779, now seen corresponding path program 235 times [2021-07-13 19:41:31,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:31,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533920949] [2021-07-13 19:41:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:32,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:32,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533920949] [2021-07-13 19:41:32,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533920949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:32,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213893378] [2021-07-13 19:41:32,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:32,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:32,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:32,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:32,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:32,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:32,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:41:32,441 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:32,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:32,448 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:32,453 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:32,457 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:32,461 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:41:32,465 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:32,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:32,468 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:32,522 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-07-13 19:41:32,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:32,523 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:440, output treesize:40 [2021-07-13 19:41:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:32,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213893378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:32,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:32,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:41:32,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109100045] [2021-07-13 19:41:32,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:41:32,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:32,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:41:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:32,630 INFO L87 Difference]: Start difference. First operand 201 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:32,968 INFO L93 Difference]: Finished difference Result 270 states and 613 transitions. [2021-07-13 19:41:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:32,969 INFO L225 Difference]: With dead ends: 270 [2021-07-13 19:41:32,969 INFO L226 Difference]: Without dead ends: 263 [2021-07-13 19:41:32,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-13 19:41:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 206. [2021-07-13 19:41:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.5073170731707317) internal successors, (514), 205 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 514 transitions. [2021-07-13 19:41:32,971 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 514 transitions. Word has length 18 [2021-07-13 19:41:32,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:32,971 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 514 transitions. [2021-07-13 19:41:32,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 514 transitions. [2021-07-13 19:41:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:32,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:32,972 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:33,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3180,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:33,172 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1868470511, now seen corresponding path program 236 times [2021-07-13 19:41:33,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:33,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250500700] [2021-07-13 19:41:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:33,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:33,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250500700] [2021-07-13 19:41:33,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250500700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:33,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951504004] [2021-07-13 19:41:33,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:33,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:33,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:33,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:33,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:33,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:33,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:33,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:33,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:33,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:33,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:33,734 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:33,738 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:33,742 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:33,747 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:33,751 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:33,755 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:33,759 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:33,763 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:33,766 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:33,770 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:33,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:33,773 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,829 INFO L628 ElimStorePlain]: treesize reduction 40, result has 59.2 percent of original size [2021-07-13 19:41:33,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:33,830 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-07-13 19:41:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:33,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951504004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:33,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:33,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:41:33,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202952629] [2021-07-13 19:41:33,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:41:33,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:33,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:41:33,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:33,937 INFO L87 Difference]: Start difference. First operand 206 states and 514 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:34,380 INFO L93 Difference]: Finished difference Result 296 states and 652 transitions. [2021-07-13 19:41:34,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:41:34,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:34,381 INFO L225 Difference]: With dead ends: 296 [2021-07-13 19:41:34,381 INFO L226 Difference]: Without dead ends: 282 [2021-07-13 19:41:34,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 546.2ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-13 19:41:34,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 206. [2021-07-13 19:41:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.5073170731707317) internal successors, (514), 205 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 514 transitions. [2021-07-13 19:41:34,383 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 514 transitions. Word has length 18 [2021-07-13 19:41:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:34,383 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 514 transitions. [2021-07-13 19:41:34,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 514 transitions. [2021-07-13 19:41:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:34,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:34,384 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:34,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3260 [2021-07-13 19:41:34,584 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:34,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1110339481, now seen corresponding path program 237 times [2021-07-13 19:41:34,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:34,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462355241] [2021-07-13 19:41:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:34,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:34,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462355241] [2021-07-13 19:41:34,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462355241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:34,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647532767] [2021-07-13 19:41:34,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:34,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:41:34,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:34,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:35,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:35,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:35,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:35,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:35,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:35,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:35,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:41:35,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:35,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:35,104 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:35,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:35,108 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:35,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:35,112 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:35,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:35,116 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:35,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:35,119 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 17 treesize of output 1 [2021-07-13 19:41:35,119 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:35,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:35,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:35,145 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:325, output treesize:41 [2021-07-13 19:41:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:35,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647532767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:35,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:35,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:41:35,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514196457] [2021-07-13 19:41:35,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:35,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:35,203 INFO L87 Difference]: Start difference. First operand 206 states and 514 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:35,572 INFO L93 Difference]: Finished difference Result 258 states and 595 transitions. [2021-07-13 19:41:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:41:35,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:35,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:35,573 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:41:35,573 INFO L226 Difference]: Without dead ends: 251 [2021-07-13 19:41:35,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-13 19:41:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 206. [2021-07-13 19:41:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.5073170731707317) internal successors, (514), 205 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 514 transitions. [2021-07-13 19:41:35,575 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 514 transitions. Word has length 18 [2021-07-13 19:41:35,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:35,576 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 514 transitions. [2021-07-13 19:41:35,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 514 transitions. [2021-07-13 19:41:35,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:35,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:35,576 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:35,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-07-13 19:41:35,776 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1168349509, now seen corresponding path program 238 times [2021-07-13 19:41:35,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:35,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744764295] [2021-07-13 19:41:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:36,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:36,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744764295] [2021-07-13 19:41:36,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744764295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:36,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040781261] [2021-07-13 19:41:36,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:36,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:36,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:36,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:36,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:36,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:36,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:36,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:36,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:36,484 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-07-13 19:41:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:36,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:36,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:36,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:36,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:36,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:36,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:36,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:36,544 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:41:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:36,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040781261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:36,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:36,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:41:36,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132096396] [2021-07-13 19:41:36,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:41:36,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:36,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:41:36,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:36,610 INFO L87 Difference]: Start difference. First operand 206 states and 514 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:37,137 INFO L93 Difference]: Finished difference Result 291 states and 663 transitions. [2021-07-13 19:41:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:41:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:37,137 INFO L225 Difference]: With dead ends: 291 [2021-07-13 19:41:37,137 INFO L226 Difference]: Without dead ends: 277 [2021-07-13 19:41:37,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 695.2ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:41:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-13 19:41:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 218. [2021-07-13 19:41:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.5299539170506913) internal successors, (549), 217 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 549 transitions. [2021-07-13 19:41:37,141 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 549 transitions. Word has length 18 [2021-07-13 19:41:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:37,141 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 549 transitions. [2021-07-13 19:41:37,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 549 transitions. [2021-07-13 19:41:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:37,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:37,156 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:37,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:37,373 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1825115273, now seen corresponding path program 239 times [2021-07-13 19:41:37,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:37,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120738888] [2021-07-13 19:41:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:37,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:37,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120738888] [2021-07-13 19:41:37,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120738888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:37,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818054670] [2021-07-13 19:41:37,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:37,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:37,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:37,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:37,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:37,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:37,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:37,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:37,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:37,837 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:37,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:37,853 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:124, output treesize:41 [2021-07-13 19:41:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:37,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818054670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:37,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:37,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:41:37,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875502223] [2021-07-13 19:41:37,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:37,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:37,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:37,921 INFO L87 Difference]: Start difference. First operand 218 states and 549 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:38,708 INFO L93 Difference]: Finished difference Result 313 states and 703 transitions. [2021-07-13 19:41:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:41:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:38,709 INFO L225 Difference]: With dead ends: 313 [2021-07-13 19:41:38,709 INFO L226 Difference]: Without dead ends: 299 [2021-07-13 19:41:38,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 853.1ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:41:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-07-13 19:41:38,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 220. [2021-07-13 19:41:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.538812785388128) internal successors, (556), 219 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 556 transitions. [2021-07-13 19:41:38,711 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 556 transitions. Word has length 18 [2021-07-13 19:41:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:38,711 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 556 transitions. [2021-07-13 19:41:38,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 556 transitions. [2021-07-13 19:41:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:38,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:38,712 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:38,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3370,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:38,913 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1430659269, now seen corresponding path program 240 times [2021-07-13 19:41:38,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:38,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735497124] [2021-07-13 19:41:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:39,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:39,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735497124] [2021-07-13 19:41:39,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735497124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:39,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256245138] [2021-07-13 19:41:39,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:39,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:41:39,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:39,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:39,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:41:39,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:39,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:41:39,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:41:39,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:41:39,592 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:41:39,598 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:41:39,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:39,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:39,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:41:39,618 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:39,622 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:39,625 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:41:39,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:39,633 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:39,636 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:39,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:39,639 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:39,693 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-07-13 19:41:39,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:39,695 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:40 [2021-07-13 19:41:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:39,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256245138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:39,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:39,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:41:39,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294931715] [2021-07-13 19:41:39,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:41:39,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:39,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:41:39,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:39,801 INFO L87 Difference]: Start difference. First operand 220 states and 556 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:40,935 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-07-13 19:41:41,180 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-13 19:41:41,444 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-07-13 19:41:41,605 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-07-13 19:41:41,785 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-07-13 19:41:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:41,831 INFO L93 Difference]: Finished difference Result 403 states and 867 transitions. [2021-07-13 19:41:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:41:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:41,832 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:41:41,832 INFO L226 Difference]: Without dead ends: 358 [2021-07-13 19:41:41,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2072.7ms TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:41:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-13 19:41:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 222. [2021-07-13 19:41:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.5384615384615383) internal successors, (561), 221 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 561 transitions. [2021-07-13 19:41:41,835 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 561 transitions. Word has length 18 [2021-07-13 19:41:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:41,835 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 561 transitions. [2021-07-13 19:41:41,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 561 transitions. [2021-07-13 19:41:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:41,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:41,836 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:42,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3382 [2021-07-13 19:41:42,036 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1127530295, now seen corresponding path program 241 times [2021-07-13 19:41:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:42,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988675441] [2021-07-13 19:41:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:42,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988675441] [2021-07-13 19:41:42,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988675441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497886296] [2021-07-13 19:41:42,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:42,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:42,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:42,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:42,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:42,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,752 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:41:42,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:42,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:42,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:42,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:42,787 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:42,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:42,813 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:41:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497886296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:42,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:41:42,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81993556] [2021-07-13 19:41:42,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:41:42,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:42,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:41:42,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:42,914 INFO L87 Difference]: Start difference. First operand 222 states and 561 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:43,468 INFO L93 Difference]: Finished difference Result 262 states and 621 transitions. [2021-07-13 19:41:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:41:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:43,469 INFO L225 Difference]: With dead ends: 262 [2021-07-13 19:41:43,469 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 19:41:43,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 836.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:41:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 19:41:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 222. [2021-07-13 19:41:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.5384615384615383) internal successors, (561), 221 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 561 transitions. [2021-07-13 19:41:43,472 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 561 transitions. Word has length 18 [2021-07-13 19:41:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:43,472 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 561 transitions. [2021-07-13 19:41:43,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 561 transitions. [2021-07-13 19:41:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:43,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:43,472 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:43,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-07-13 19:41:43,673 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash -848326601, now seen corresponding path program 242 times [2021-07-13 19:41:43,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:43,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228275920] [2021-07-13 19:41:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:43,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:43,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228275920] [2021-07-13 19:41:43,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228275920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:43,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849572753] [2021-07-13 19:41:43,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:43,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:43,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:43,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:44,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:44,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:44,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:44,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:44,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:44,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:44,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:44,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:44,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,343 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-07-13 19:41:44,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:44,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:44,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:44,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:44,377 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:44,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:44,402 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:41:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:44,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849572753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:44,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:44,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:41:44,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493488165] [2021-07-13 19:41:44,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:44,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:44,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:44,453 INFO L87 Difference]: Start difference. First operand 222 states and 561 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:44,904 INFO L93 Difference]: Finished difference Result 290 states and 685 transitions. [2021-07-13 19:41:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:41:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:44,905 INFO L225 Difference]: With dead ends: 290 [2021-07-13 19:41:44,905 INFO L226 Difference]: Without dead ends: 283 [2021-07-13 19:41:44,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 604.1ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-13 19:41:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 228. [2021-07-13 19:41:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.5726872246696035) internal successors, (584), 227 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 584 transitions. [2021-07-13 19:41:44,908 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 584 transitions. Word has length 18 [2021-07-13 19:41:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:44,908 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 584 transitions. [2021-07-13 19:41:44,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 584 transitions. [2021-07-13 19:41:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:44,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:44,908 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:45,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3454 [2021-07-13 19:41:45,109 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:45,109 INFO L82 PathProgramCache]: Analyzing trace with hash -453870597, now seen corresponding path program 243 times [2021-07-13 19:41:45,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:45,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675226212] [2021-07-13 19:41:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:45,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675226212] [2021-07-13 19:41:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675226212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175524948] [2021-07-13 19:41:45,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:45,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:45,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:45,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:45,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:41:45,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:45,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:41:45,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:41:45,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:41:45,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:41:45,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:41:45,690 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:45,694 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:45,698 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:41:45,702 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:45,706 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:45,709 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:41:45,713 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:45,717 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:45,720 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:45,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:45,723 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:45,777 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-07-13 19:41:45,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:45,779 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:40 [2021-07-13 19:41:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:45,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175524948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:45,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:45,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:41:45,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711961688] [2021-07-13 19:41:45,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:45,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:45,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:45,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:45,882 INFO L87 Difference]: Start difference. First operand 228 states and 584 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,729 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-13 19:41:46,893 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-07-13 19:41:47,230 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-07-13 19:41:47,356 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-07-13 19:41:47,502 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-13 19:41:47,641 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 19:41:47,798 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-07-13 19:41:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:47,834 INFO L93 Difference]: Finished difference Result 417 states and 898 transitions. [2021-07-13 19:41:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:41:47,835 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:47,835 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:41:47,835 INFO L226 Difference]: Without dead ends: 365 [2021-07-13 19:41:47,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1968.2ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:41:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-13 19:41:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 233. [2021-07-13 19:41:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5474137931034484) internal successors, (591), 232 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 591 transitions. [2021-07-13 19:41:47,839 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 591 transitions. Word has length 18 [2021-07-13 19:41:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:47,839 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 591 transitions. [2021-07-13 19:41:47,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 591 transitions. [2021-07-13 19:41:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:47,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:47,840 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:48,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3483,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:48,054 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:48,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:48,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2104318967, now seen corresponding path program 244 times [2021-07-13 19:41:48,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:48,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251237743] [2021-07-13 19:41:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:48,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:48,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251237743] [2021-07-13 19:41:48,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251237743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:48,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130400280] [2021-07-13 19:41:48,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:48,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:48,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:48,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:48,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:48,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:48,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:48,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:48,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:48,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:48,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:48,555 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 17 treesize of output 8 [2021-07-13 19:41:48,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:48,636 INFO L628 ElimStorePlain]: treesize reduction 172, result has 30.9 percent of original size [2021-07-13 19:41:48,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:48,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:48,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:48,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:48,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:48,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:48,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:48,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:48,698 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-07-13 19:41:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:48,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130400280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:48,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:48,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:41:48,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384683081] [2021-07-13 19:41:48,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:48,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:48,787 INFO L87 Difference]: Start difference. First operand 233 states and 591 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:49,300 INFO L93 Difference]: Finished difference Result 309 states and 713 transitions. [2021-07-13 19:41:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:41:49,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:49,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:49,302 INFO L225 Difference]: With dead ends: 309 [2021-07-13 19:41:49,302 INFO L226 Difference]: Without dead ends: 295 [2021-07-13 19:41:49,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 672.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:41:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-13 19:41:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 235. [2021-07-13 19:41:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.547008547008547) internal successors, (596), 234 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 596 transitions. [2021-07-13 19:41:49,306 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 596 transitions. Word has length 18 [2021-07-13 19:41:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:49,306 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 596 transitions. [2021-07-13 19:41:49,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 596 transitions. [2021-07-13 19:41:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:49,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:49,306 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:49,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:49,510 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash 83984981, now seen corresponding path program 245 times [2021-07-13 19:41:49,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:49,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176786200] [2021-07-13 19:41:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:41:49,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:49,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176786200] [2021-07-13 19:41:49,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176786200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:49,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281778977] [2021-07-13 19:41:49,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:49,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:49,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:49,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:49,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:49,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:49,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:49,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:49,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:49,895 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:49,930 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:41:49,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:49,931 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-07-13 19:41:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:50,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281778977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:50,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:50,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:41:50,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14931221] [2021-07-13 19:41:50,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:41:50,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:41:50,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:50,024 INFO L87 Difference]: Start difference. First operand 235 states and 596 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:50,655 INFO L93 Difference]: Finished difference Result 287 states and 690 transitions. [2021-07-13 19:41:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:50,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:50,656 INFO L225 Difference]: With dead ends: 287 [2021-07-13 19:41:50,656 INFO L226 Difference]: Without dead ends: 280 [2021-07-13 19:41:50,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 789.8ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:41:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-13 19:41:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 243. [2021-07-13 19:41:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.5578512396694215) internal successors, (619), 242 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 619 transitions. [2021-07-13 19:41:50,659 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 619 transitions. Word has length 18 [2021-07-13 19:41:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:50,659 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 619 transitions. [2021-07-13 19:41:50,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 619 transitions. [2021-07-13 19:41:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:50,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:50,659 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:50,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:50,860 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:50,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1652792751, now seen corresponding path program 246 times [2021-07-13 19:41:50,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:50,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537343348] [2021-07-13 19:41:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:41:51,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:51,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537343348] [2021-07-13 19:41:51,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537343348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:51,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946384087] [2021-07-13 19:41:51,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:51,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:41:51,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:51,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:51,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:51,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:51,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:51,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:51,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:41:51,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:51,472 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:51,476 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:51,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:51,483 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:51,487 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:51,491 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:51,495 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:51,499 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:51,501 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:51,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:41:51,505 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:51,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:51,532 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:601, output treesize:40 [2021-07-13 19:41:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:51,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946384087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:51,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:51,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:41:51,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305778912] [2021-07-13 19:41:51,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:51,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:51,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:51,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:51,624 INFO L87 Difference]: Start difference. First operand 243 states and 619 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:52,131 INFO L93 Difference]: Finished difference Result 281 states and 671 transitions. [2021-07-13 19:41:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:41:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:52,132 INFO L225 Difference]: With dead ends: 281 [2021-07-13 19:41:52,132 INFO L226 Difference]: Without dead ends: 274 [2021-07-13 19:41:52,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 656.1ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:41:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-13 19:41:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 243. [2021-07-13 19:41:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.5578512396694215) internal successors, (619), 242 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 619 transitions. [2021-07-13 19:41:52,134 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 619 transitions. Word has length 18 [2021-07-13 19:41:52,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:52,135 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 619 transitions. [2021-07-13 19:41:52,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:52,135 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 619 transitions. [2021-07-13 19:41:52,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:52,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:52,135 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:52,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3567,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:52,336 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1326017241, now seen corresponding path program 247 times [2021-07-13 19:41:52,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:52,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198368467] [2021-07-13 19:41:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:41:52,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:52,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198368467] [2021-07-13 19:41:52,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198368467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:52,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982565519] [2021-07-13 19:41:52,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:52,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:52,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:41:52,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:52,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:52,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:52,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:52,945 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:52,949 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:52,953 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:52,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:52,961 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:41:52,965 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:52,969 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:52,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:52,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:52,972 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:53,024 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-07-13 19:41:53,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:53,025 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-07-13 19:41:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:53,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982565519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:53,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:53,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:41:53,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184235124] [2021-07-13 19:41:53,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:41:53,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:53,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:41:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:53,090 INFO L87 Difference]: Start difference. First operand 243 states and 619 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:53,645 INFO L93 Difference]: Finished difference Result 272 states and 659 transitions. [2021-07-13 19:41:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:53,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:53,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:53,646 INFO L225 Difference]: With dead ends: 272 [2021-07-13 19:41:53,646 INFO L226 Difference]: Without dead ends: 265 [2021-07-13 19:41:53,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 765.7ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-13 19:41:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 243. [2021-07-13 19:41:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.5578512396694215) internal successors, (619), 242 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 619 transitions. [2021-07-13 19:41:53,649 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 619 transitions. Word has length 18 [2021-07-13 19:41:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:53,649 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 619 transitions. [2021-07-13 19:41:53,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 619 transitions. [2021-07-13 19:41:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:53,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:53,649 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:53,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:53,850 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:53,850 INFO L82 PathProgramCache]: Analyzing trace with hash -422361285, now seen corresponding path program 248 times [2021-07-13 19:41:53,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:53,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600307898] [2021-07-13 19:41:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:54,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:54,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600307898] [2021-07-13 19:41:54,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600307898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:54,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202578350] [2021-07-13 19:41:54,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:54,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:54,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:54,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:54,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:54,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:54,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:54,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:41:54,377 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:54,381 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:41:54,385 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:54,389 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:54,393 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:54,397 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:54,401 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:54,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:54,405 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:54,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:54,432 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:446, output treesize:40 [2021-07-13 19:41:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:54,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202578350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:54,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:54,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:41:54,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409157458] [2021-07-13 19:41:54,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:41:54,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:54,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:41:54,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:41:54,536 INFO L87 Difference]: Start difference. First operand 243 states and 619 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:55,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:55,036 INFO L93 Difference]: Finished difference Result 289 states and 690 transitions. [2021-07-13 19:41:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:55,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:55,037 INFO L225 Difference]: With dead ends: 289 [2021-07-13 19:41:55,037 INFO L226 Difference]: Without dead ends: 282 [2021-07-13 19:41:55,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-13 19:41:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 246. [2021-07-13 19:41:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.5673469387755103) internal successors, (629), 245 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 629 transitions. [2021-07-13 19:41:55,039 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 629 transitions. Word has length 18 [2021-07-13 19:41:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:55,039 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 629 transitions. [2021-07-13 19:41:55,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 629 transitions. [2021-07-13 19:41:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:55,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:55,040 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:55,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3694 [2021-07-13 19:41:55,240 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:55,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2135828279, now seen corresponding path program 249 times [2021-07-13 19:41:55,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:55,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290650178] [2021-07-13 19:41:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:55,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:55,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290650178] [2021-07-13 19:41:55,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290650178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:55,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373910036] [2021-07-13 19:41:55,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:55,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:55,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:41:55,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-07-13 19:41:55,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:55,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:55,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:41:55,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:55,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:55,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:55,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:41:56,001 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:41:56,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:41:56,009 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:41:56,013 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:56,016 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:41:56,019 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:56,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:56,047 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:488, output treesize:40 [2021-07-13 19:41:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:56,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373910036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:56,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:56,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:41:56,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009585763] [2021-07-13 19:41:56,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:41:56,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:56,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:41:56,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:41:56,150 INFO L87 Difference]: Start difference. First operand 246 states and 629 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,153 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-13 19:41:57,270 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-13 19:41:57,650 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-13 19:41:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:57,897 INFO L93 Difference]: Finished difference Result 444 states and 995 transitions. [2021-07-13 19:41:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:41:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:57,898 INFO L225 Difference]: With dead ends: 444 [2021-07-13 19:41:57,898 INFO L226 Difference]: Without dead ends: 418 [2021-07-13 19:41:57,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1877.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:41:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-13 19:41:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 270. [2021-07-13 19:41:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.5985130111524164) internal successors, (699), 269 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 699 transitions. [2021-07-13 19:41:57,902 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 699 transitions. Word has length 18 [2021-07-13 19:41:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:57,902 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 699 transitions. [2021-07-13 19:41:57,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,902 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 699 transitions. [2021-07-13 19:41:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:57,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:57,903 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:58,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3745 [2021-07-13 19:41:58,126 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:58,126 INFO L82 PathProgramCache]: Analyzing trace with hash 819670975, now seen corresponding path program 250 times [2021-07-13 19:41:58,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:58,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497882309] [2021-07-13 19:41:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:58,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:58,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497882309] [2021-07-13 19:41:58,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497882309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:58,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645813451] [2021-07-13 19:41:58,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:58,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:58,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:58,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:58,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:58,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:41:58,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:58,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:41:58,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:58,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:58,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:58,719 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:41:58,723 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:41:58,727 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:41:58,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:41:58,731 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:58,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:58,757 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:343, output treesize:41 [2021-07-13 19:41:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:58,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645813451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:58,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:58,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:41:58,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963899229] [2021-07-13 19:41:58,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:41:58,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:58,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:41:58,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:41:58,815 INFO L87 Difference]: Start difference. First operand 270 states and 699 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:59,305 INFO L93 Difference]: Finished difference Result 303 states and 745 transitions. [2021-07-13 19:41:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:41:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:41:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:59,306 INFO L225 Difference]: With dead ends: 303 [2021-07-13 19:41:59,306 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 19:41:59,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:41:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 19:41:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 270. [2021-07-13 19:41:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.5985130111524164) internal successors, (699), 269 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 699 transitions. [2021-07-13 19:41:59,309 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 699 transitions. Word has length 18 [2021-07-13 19:41:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:59,309 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 699 transitions. [2021-07-13 19:41:59,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 699 transitions. [2021-07-13 19:41:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:41:59,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:59,310 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:59,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3837 [2021-07-13 19:41:59,510 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1326499785, now seen corresponding path program 251 times [2021-07-13 19:41:59,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:59,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198828809] [2021-07-13 19:41:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:59,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198828809] [2021-07-13 19:41:59,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198828809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668135668] [2021-07-13 19:41:59,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:59,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:59,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:59,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:41:59,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:00,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:00,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:00,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:00,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:00,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:00,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,226 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:42:00,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:00,227 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-07-13 19:42:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:00,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668135668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:00,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:00,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:42:00,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970462854] [2021-07-13 19:42:00,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:42:00,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:00,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:42:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:42:00,298 INFO L87 Difference]: Start difference. First operand 270 states and 699 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:00,853 INFO L93 Difference]: Finished difference Result 350 states and 826 transitions. [2021-07-13 19:42:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:42:00,853 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:00,854 INFO L225 Difference]: With dead ends: 350 [2021-07-13 19:42:00,854 INFO L226 Difference]: Without dead ends: 343 [2021-07-13 19:42:00,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 853.7ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:42:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-13 19:42:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 275. [2021-07-13 19:42:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.605839416058394) internal successors, (714), 274 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 714 transitions. [2021-07-13 19:42:00,857 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 714 transitions. Word has length 18 [2021-07-13 19:42:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:00,857 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 714 transitions. [2021-07-13 19:42:00,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 714 transitions. [2021-07-13 19:42:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:00,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:00,858 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:01,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3888,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:01,058 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:01,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1804816363, now seen corresponding path program 252 times [2021-07-13 19:42:01,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:01,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508304926] [2021-07-13 19:42:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:01,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:01,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508304926] [2021-07-13 19:42:01,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508304926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:01,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573559195] [2021-07-13 19:42:01,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:01,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:42:01,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:01,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:01,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:01,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:42:01,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:42:01,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:01,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:42:01,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:42:01,819 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:42:01,823 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:42:01,828 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:42:01,832 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:01,836 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:01,841 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:01,845 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:01,849 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:01,851 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:01,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:42:01,855 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:01,906 INFO L628 ElimStorePlain]: treesize reduction 21, result has 73.8 percent of original size [2021-07-13 19:42:01,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:01,908 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:641, output treesize:41 [2021-07-13 19:42:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:01,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573559195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:01,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:01,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:42:01,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062466428] [2021-07-13 19:42:01,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:01,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:01,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:01,978 INFO L87 Difference]: Start difference. First operand 275 states and 714 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:02,350 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-13 19:42:03,495 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 19:42:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:03,682 INFO L93 Difference]: Finished difference Result 484 states and 1089 transitions. [2021-07-13 19:42:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:42:03,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:03,683 INFO L225 Difference]: With dead ends: 484 [2021-07-13 19:42:03,683 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:42:03,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1766.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:42:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:42:03,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 294. [2021-07-13 19:42:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.651877133105802) internal successors, (777), 293 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 777 transitions. [2021-07-13 19:42:03,687 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 777 transitions. Word has length 18 [2021-07-13 19:42:03,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:03,687 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 777 transitions. [2021-07-13 19:42:03,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 777 transitions. [2021-07-13 19:42:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:03,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:03,688 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:03,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3898,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:03,888 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:03,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1833385169, now seen corresponding path program 253 times [2021-07-13 19:42:03,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:03,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992291783] [2021-07-13 19:42:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:04,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:04,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992291783] [2021-07-13 19:42:04,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992291783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:04,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014006940] [2021-07-13 19:42:04,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:04,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:04,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:04,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:04,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:04,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:04,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:04,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:42:04,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:04,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:04,427 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:04,432 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:42:04,437 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:04,442 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:04,447 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:04,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:04,451 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:04,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:04,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:04,479 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:444, output treesize:41 [2021-07-13 19:42:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:04,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014006940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:04,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:04,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:42:04,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443100882] [2021-07-13 19:42:04,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:42:04,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:04,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:42:04,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:42:04,545 INFO L87 Difference]: Start difference. First operand 294 states and 777 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:05,249 INFO L93 Difference]: Finished difference Result 417 states and 981 transitions. [2021-07-13 19:42:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:42:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:05,250 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:42:05,250 INFO L226 Difference]: Without dead ends: 381 [2021-07-13 19:42:05,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 771.0ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:42:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-13 19:42:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 296. [2021-07-13 19:42:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.6542372881355933) internal successors, (783), 295 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 783 transitions. [2021-07-13 19:42:05,253 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 783 transitions. Word has length 18 [2021-07-13 19:42:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:05,254 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 783 transitions. [2021-07-13 19:42:05,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 783 transitions. [2021-07-13 19:42:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:05,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:05,254 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:05,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:05,455 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:05,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2067126123, now seen corresponding path program 254 times [2021-07-13 19:42:05,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:05,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995824651] [2021-07-13 19:42:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:05,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:05,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995824651] [2021-07-13 19:42:05,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995824651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:05,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135146244] [2021-07-13 19:42:05,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:05,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:05,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:05,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:05,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:05,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:05,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:05,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:05,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:05,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:05,997 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:06,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:06,006 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:06,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:06,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:06,018 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:06,022 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:06,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:06,030 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:06,033 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:06,037 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:06,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:42:06,040 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:06,094 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-07-13 19:42:06,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:06,095 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-07-13 19:42:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:06,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135146244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:06,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:06,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:42:06,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817730419] [2021-07-13 19:42:06,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:06,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:06,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:06,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:06,188 INFO L87 Difference]: Start difference. First operand 296 states and 783 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:06,836 INFO L93 Difference]: Finished difference Result 403 states and 962 transitions. [2021-07-13 19:42:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:42:06,836 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:06,837 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:42:06,837 INFO L226 Difference]: Without dead ends: 386 [2021-07-13 19:42:06,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 738.2ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:42:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-07-13 19:42:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 299. [2021-07-13 19:42:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.664429530201342) internal successors, (794), 298 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 794 transitions. [2021-07-13 19:42:06,841 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 794 transitions. Word has length 18 [2021-07-13 19:42:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:06,841 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 794 transitions. [2021-07-13 19:42:06,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 794 transitions. [2021-07-13 19:42:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:06,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:06,842 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:07,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-07-13 19:42:07,056 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:07,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:07,056 INFO L82 PathProgramCache]: Analyzing trace with hash 491063441, now seen corresponding path program 255 times [2021-07-13 19:42:07,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:07,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36261752] [2021-07-13 19:42:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:07,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:07,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36261752] [2021-07-13 19:42:07,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36261752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:07,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219030976] [2021-07-13 19:42:07,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:07,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:07,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:07,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:07,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:42:07,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-07-13 19:42:07,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:07,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:42:07,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:07,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:42:07,633 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:42:07,637 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:42:07,641 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:07,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:07,646 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:07,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:07,676 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:352, output treesize:40 [2021-07-13 19:42:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:07,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219030976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:07,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:07,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:42:07,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772852712] [2021-07-13 19:42:07,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:07,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:07,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:07,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:07,781 INFO L87 Difference]: Start difference. First operand 299 states and 794 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:08,713 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-07-13 19:42:09,183 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-07-13 19:42:09,647 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-07-13 19:42:09,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:09,693 INFO L93 Difference]: Finished difference Result 441 states and 1013 transitions. [2021-07-13 19:42:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:42:09,693 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:09,694 INFO L225 Difference]: With dead ends: 441 [2021-07-13 19:42:09,694 INFO L226 Difference]: Without dead ends: 403 [2021-07-13 19:42:09,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1984.8ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:42:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-13 19:42:09,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 296. [2021-07-13 19:42:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.6271186440677967) internal successors, (775), 295 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 775 transitions. [2021-07-13 19:42:09,698 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 775 transitions. Word has length 18 [2021-07-13 19:42:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:09,698 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 775 transitions. [2021-07-13 19:42:09,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 775 transitions. [2021-07-13 19:42:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:09,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:09,698 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:09,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4070,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:09,899 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2035616811, now seen corresponding path program 256 times [2021-07-13 19:42:09,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:09,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062296308] [2021-07-13 19:42:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:10,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:10,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062296308] [2021-07-13 19:42:10,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062296308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:10,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822774916] [2021-07-13 19:42:10,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:10,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:10,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:10,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:10,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:10,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:42:10,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,530 INFO L628 ElimStorePlain]: treesize reduction 160, result has 32.5 percent of original size [2021-07-13 19:42:10,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:10,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:10,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:10,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:10,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:10,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:10,592 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-07-13 19:42:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:10,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822774916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:10,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:10,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:42:10,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218597384] [2021-07-13 19:42:10,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:10,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:10,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:10,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:10,690 INFO L87 Difference]: Start difference. First operand 296 states and 775 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:11,088 INFO L93 Difference]: Finished difference Result 365 states and 891 transitions. [2021-07-13 19:42:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:11,089 INFO L225 Difference]: With dead ends: 365 [2021-07-13 19:42:11,089 INFO L226 Difference]: Without dead ends: 358 [2021-07-13 19:42:11,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:42:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-13 19:42:11,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 300. [2021-07-13 19:42:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6387959866220734) internal successors, (789), 299 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 789 transitions. [2021-07-13 19:42:11,093 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 789 transitions. Word has length 18 [2021-07-13 19:42:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:11,093 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 789 transitions. [2021-07-13 19:42:11,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 789 transitions. [2021-07-13 19:42:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:11,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:11,093 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:11,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-07-13 19:42:11,301 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash 522572753, now seen corresponding path program 257 times [2021-07-13 19:42:11,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:11,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832934408] [2021-07-13 19:42:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:11,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832934408] [2021-07-13 19:42:11,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832934408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030280806] [2021-07-13 19:42:11,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:11,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:42:11,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:11,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:11,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:11,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:11,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:11,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:11,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:11,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:11,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:11,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:11,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:11,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:11,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:11,852 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-07-13 19:42:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:11,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030280806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:11,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:11,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:42:11,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191187218] [2021-07-13 19:42:11,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:11,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:11,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:11,951 INFO L87 Difference]: Start difference. First operand 300 states and 789 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:12,408 INFO L93 Difference]: Finished difference Result 376 states and 904 transitions. [2021-07-13 19:42:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:12,409 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:42:12,409 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:42:12,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 675.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:42:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:42:12,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 300. [2021-07-13 19:42:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6387959866220734) internal successors, (789), 299 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 789 transitions. [2021-07-13 19:42:12,413 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 789 transitions. Word has length 18 [2021-07-13 19:42:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:12,413 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 789 transitions. [2021-07-13 19:42:12,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 789 transitions. [2021-07-13 19:42:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:12,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:12,413 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:12,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:12,614 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:12,614 INFO L82 PathProgramCache]: Analyzing trace with hash -793584551, now seen corresponding path program 258 times [2021-07-13 19:42:12,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:12,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568647156] [2021-07-13 19:42:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:12,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:12,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568647156] [2021-07-13 19:42:12,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568647156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:12,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566882077] [2021-07-13 19:42:12,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:12,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:12,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:12,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:12,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:13,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:13,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:13,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:13,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:13,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:13,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:13,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:13,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:13,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:13,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:13,082 INFO L628 ElimStorePlain]: treesize reduction 15, result has 73.2 percent of original size [2021-07-13 19:42:13,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:13,083 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:124, output treesize:41 [2021-07-13 19:42:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:13,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566882077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:13,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:13,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:42:13,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79704002] [2021-07-13 19:42:13,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:42:13,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:42:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:13,138 INFO L87 Difference]: Start difference. First operand 300 states and 789 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:13,603 INFO L93 Difference]: Finished difference Result 357 states and 876 transitions. [2021-07-13 19:42:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:42:13,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:13,604 INFO L225 Difference]: With dead ends: 357 [2021-07-13 19:42:13,604 INFO L226 Difference]: Without dead ends: 350 [2021-07-13 19:42:13,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:42:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-13 19:42:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 300. [2021-07-13 19:42:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6387959866220734) internal successors, (789), 299 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 789 transitions. [2021-07-13 19:42:13,607 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 789 transitions. Word has length 18 [2021-07-13 19:42:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:13,607 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 789 transitions. [2021-07-13 19:42:13,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 789 transitions. [2021-07-13 19:42:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:13,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:13,607 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:13,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:13,808 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:13,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1484793455, now seen corresponding path program 259 times [2021-07-13 19:42:13,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:13,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764522227] [2021-07-13 19:42:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:13,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:13,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764522227] [2021-07-13 19:42:13,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764522227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:13,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483465115] [2021-07-13 19:42:13,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:14,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:14,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:14,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:14,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:14,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:14,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:14,421 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:14,425 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:14,428 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:14,431 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:14,435 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:14,439 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:14,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:42:14,442 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:14,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:14,467 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:474, output treesize:41 [2021-07-13 19:42:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:14,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483465115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:14,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:14,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:42:14,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030165881] [2021-07-13 19:42:14,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:14,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:14,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:14,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:14,528 INFO L87 Difference]: Start difference. First operand 300 states and 789 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:14,910 INFO L93 Difference]: Finished difference Result 372 states and 909 transitions. [2021-07-13 19:42:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:42:14,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:14,910 INFO L225 Difference]: With dead ends: 372 [2021-07-13 19:42:14,910 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:42:14,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:42:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 301. [2021-07-13 19:42:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.64) internal successors, (792), 300 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 792 transitions. [2021-07-13 19:42:14,914 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 792 transitions. Word has length 18 [2021-07-13 19:42:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:14,914 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 792 transitions. [2021-07-13 19:42:14,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 792 transitions. [2021-07-13 19:42:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:14,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:14,914 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:15,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4160,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:15,115 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1090337451, now seen corresponding path program 260 times [2021-07-13 19:42:15,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:15,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58473570] [2021-07-13 19:42:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:15,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:15,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58473570] [2021-07-13 19:42:15,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58473570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:15,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156260494] [2021-07-13 19:42:15,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:15,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:15,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:15,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:42:15,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:15,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:15,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:15,570 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:15,574 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:15,578 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:15,582 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:15,586 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:15,589 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:15,592 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:15,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:15,596 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:15,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:15,623 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-07-13 19:42:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:15,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156260494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:15,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:15,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:42:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862492095] [2021-07-13 19:42:15,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:15,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:15,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:15,717 INFO L87 Difference]: Start difference. First operand 301 states and 792 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:16,050 INFO L93 Difference]: Finished difference Result 385 states and 934 transitions. [2021-07-13 19:42:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:16,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:16,051 INFO L225 Difference]: With dead ends: 385 [2021-07-13 19:42:16,051 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:42:16,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:42:16,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 303. [2021-07-13 19:42:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6490066225165565) internal successors, (800), 302 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 800 transitions. [2021-07-13 19:42:16,054 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 800 transitions. Word has length 18 [2021-07-13 19:42:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:16,054 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 800 transitions. [2021-07-13 19:42:16,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 800 transitions. [2021-07-13 19:42:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:16,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:16,055 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:16,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4245,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:16,255 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:16,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:16,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1467852113, now seen corresponding path program 261 times [2021-07-13 19:42:16,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:16,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446234733] [2021-07-13 19:42:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:16,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:16,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446234733] [2021-07-13 19:42:16,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446234733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:16,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920421052] [2021-07-13 19:42:16,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:16,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:16,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:16,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:42:16,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:16,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:42:16,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:42:16,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:42:16,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:42:16,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:42:16,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:16,822 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:16,827 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:42:16,831 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:16,835 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:16,838 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:42:16,842 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:16,846 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:16,849 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:16,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:16,852 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:16,923 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-07-13 19:42:16,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:16,925 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:40 [2021-07-13 19:42:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:17,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920421052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:17,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:17,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:42:17,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255360267] [2021-07-13 19:42:17,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:42:17,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:42:17,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:17,024 INFO L87 Difference]: Start difference. First operand 303 states and 800 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:17,816 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-13 19:42:17,981 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-07-13 19:42:18,190 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-07-13 19:42:18,327 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-13 19:42:18,463 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 19:42:18,646 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-13 19:42:18,792 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-13 19:42:18,992 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 19:42:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:19,030 INFO L93 Difference]: Finished difference Result 495 states and 1126 transitions. [2021-07-13 19:42:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:42:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:19,032 INFO L225 Difference]: With dead ends: 495 [2021-07-13 19:42:19,032 INFO L226 Difference]: Without dead ends: 461 [2021-07-13 19:42:19,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2021.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:42:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-07-13 19:42:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 305. [2021-07-13 19:42:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6546052631578947) internal successors, (807), 304 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 807 transitions. [2021-07-13 19:42:19,036 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 807 transitions. Word has length 18 [2021-07-13 19:42:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:19,036 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 807 transitions. [2021-07-13 19:42:19,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 807 transitions. [2021-07-13 19:42:19,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:19,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:19,036 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:19,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4295 [2021-07-13 19:42:19,237 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:19,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2005707691, now seen corresponding path program 262 times [2021-07-13 19:42:19,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:19,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777415618] [2021-07-13 19:42:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:42:19,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:19,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777415618] [2021-07-13 19:42:19,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777415618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:19,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196523495] [2021-07-13 19:42:19,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:19,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:19,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:19,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:19,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:19,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:19,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:19,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:19,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:19,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:19,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:19,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,827 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-07-13 19:42:19,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:19,831 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:19,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:19,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:19,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:19,887 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:42:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:19,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196523495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:19,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:19,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:42:19,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481835674] [2021-07-13 19:42:19,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:19,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:19,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:19,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:19,981 INFO L87 Difference]: Start difference. First operand 305 states and 807 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:20,613 INFO L93 Difference]: Finished difference Result 350 states and 870 transitions. [2021-07-13 19:42:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:42:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:20,614 INFO L225 Difference]: With dead ends: 350 [2021-07-13 19:42:20,614 INFO L226 Difference]: Without dead ends: 343 [2021-07-13 19:42:20,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 812.2ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:42:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-13 19:42:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 305. [2021-07-13 19:42:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6546052631578947) internal successors, (807), 304 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 807 transitions. [2021-07-13 19:42:20,617 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 807 transitions. Word has length 18 [2021-07-13 19:42:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:20,618 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 807 transitions. [2021-07-13 19:42:20,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 807 transitions. [2021-07-13 19:42:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:20,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:20,618 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:20,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4343 [2021-07-13 19:42:20,819 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash 689550387, now seen corresponding path program 263 times [2021-07-13 19:42:20,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:20,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825668907] [2021-07-13 19:42:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:42:21,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:21,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825668907] [2021-07-13 19:42:21,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825668907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:21,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096235028] [2021-07-13 19:42:21,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:21,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:21,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:21,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:21,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:21,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:21,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:21,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:21,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:21,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:21,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:21,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:21,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:21,279 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:21,319 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:42:21,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:21,320 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:120, output treesize:41 [2021-07-13 19:42:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:21,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096235028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:21,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:21,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:42:21,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329156183] [2021-07-13 19:42:21,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:42:21,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:21,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:42:21,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:21,375 INFO L87 Difference]: Start difference. First operand 305 states and 807 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:21,948 INFO L93 Difference]: Finished difference Result 341 states and 858 transitions. [2021-07-13 19:42:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:21,949 INFO L225 Difference]: With dead ends: 341 [2021-07-13 19:42:21,949 INFO L226 Difference]: Without dead ends: 334 [2021-07-13 19:42:21,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 778.3ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:42:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-07-13 19:42:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 305. [2021-07-13 19:42:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6546052631578947) internal successors, (807), 304 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 807 transitions. [2021-07-13 19:42:21,952 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 807 transitions. Word has length 18 [2021-07-13 19:42:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:21,952 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 807 transitions. [2021-07-13 19:42:21,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 807 transitions. [2021-07-13 19:42:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:21,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:21,953 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:22,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:22,154 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:22,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1058828139, now seen corresponding path program 264 times [2021-07-13 19:42:22,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:22,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485229751] [2021-07-13 19:42:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:22,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:22,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485229751] [2021-07-13 19:42:22,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485229751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:22,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364239991] [2021-07-13 19:42:22,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:22,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:42:22,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:22,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:22,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:22,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:22,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:22,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:22,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:22,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:22,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:22,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:22,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:22,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:22,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:22,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:22,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:22,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:22,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:22,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:22,883 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:42:22,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:22,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:22,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:22,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:22,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:22,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:22,917 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:22,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:22,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:22,943 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:42:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:23,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364239991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:23,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:23,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:42:23,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198506527] [2021-07-13 19:42:23,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:42:23,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:23,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:42:23,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:42:23,044 INFO L87 Difference]: Start difference. First operand 305 states and 807 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:23,734 INFO L93 Difference]: Finished difference Result 361 states and 892 transitions. [2021-07-13 19:42:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:42:23,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:23,734 INFO L225 Difference]: With dead ends: 361 [2021-07-13 19:42:23,734 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:42:23,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 938.6ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:42:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:42:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 307. [2021-07-13 19:42:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.6601307189542482) internal successors, (814), 306 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 814 transitions. [2021-07-13 19:42:23,738 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 814 transitions. Word has length 18 [2021-07-13 19:42:23,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:23,738 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 814 transitions. [2021-07-13 19:42:23,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 814 transitions. [2021-07-13 19:42:23,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:23,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:23,738 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:23,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4376 [2021-07-13 19:42:23,939 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:23,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:23,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1499361425, now seen corresponding path program 265 times [2021-07-13 19:42:23,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:23,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726718968] [2021-07-13 19:42:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:24,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:24,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726718968] [2021-07-13 19:42:24,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726718968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:24,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756531580] [2021-07-13 19:42:24,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:24,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:24,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:24,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:24,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:24,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:24,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:24,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:24,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:24,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:24,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:24,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:24,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:24,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:24,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:24,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:24,636 INFO L628 ElimStorePlain]: treesize reduction 240, result has 22.6 percent of original size [2021-07-13 19:42:24,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:24,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:24,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:24,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:24,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:24,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:24,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:24,696 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:42:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:24,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756531580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:24,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:24,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:42:24,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56819703] [2021-07-13 19:42:24,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:24,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:24,787 INFO L87 Difference]: Start difference. First operand 307 states and 814 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:25,444 INFO L93 Difference]: Finished difference Result 367 states and 900 transitions. [2021-07-13 19:42:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:42:25,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:25,445 INFO L225 Difference]: With dead ends: 367 [2021-07-13 19:42:25,445 INFO L226 Difference]: Without dead ends: 360 [2021-07-13 19:42:25,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:42:25,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-13 19:42:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 306. [2021-07-13 19:42:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6557377049180326) internal successors, (810), 305 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 810 transitions. [2021-07-13 19:42:25,448 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 810 transitions. Word has length 18 [2021-07-13 19:42:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:25,448 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 810 transitions. [2021-07-13 19:42:25,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 810 transitions. [2021-07-13 19:42:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:25,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:25,448 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:25,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4400,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:25,649 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash 183204121, now seen corresponding path program 266 times [2021-07-13 19:42:25,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:25,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123431893] [2021-07-13 19:42:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:26,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:26,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123431893] [2021-07-13 19:42:26,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123431893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:26,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405991970] [2021-07-13 19:42:26,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:26,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:26,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:26,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:26,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:26,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:26,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:26,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:26,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:26,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:26,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:26,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:26,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:26,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:26,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:26,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,487 INFO L628 ElimStorePlain]: treesize reduction 251, result has 22.0 percent of original size [2021-07-13 19:42:26,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:26,491 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:26,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:26,519 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:26,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:26,544 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:452, output treesize:41 [2021-07-13 19:42:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:26,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405991970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:26,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:26,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:42:26,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910624874] [2021-07-13 19:42:26,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:42:26,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:26,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:42:26,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:42:26,610 INFO L87 Difference]: Start difference. First operand 306 states and 810 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:27,334 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2021-07-13 19:42:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:42:27,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:27,335 INFO L225 Difference]: With dead ends: 350 [2021-07-13 19:42:27,335 INFO L226 Difference]: Without dead ends: 343 [2021-07-13 19:42:27,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1024.5ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:42:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-13 19:42:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 306. [2021-07-13 19:42:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6557377049180326) internal successors, (810), 305 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 810 transitions. [2021-07-13 19:42:27,338 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 810 transitions. Word has length 18 [2021-07-13 19:42:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:27,338 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 810 transitions. [2021-07-13 19:42:27,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 810 transitions. [2021-07-13 19:42:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:27,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:27,339 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:27,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4423,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:27,539 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:27,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1542716663, now seen corresponding path program 267 times [2021-07-13 19:42:27,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:27,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94309954] [2021-07-13 19:42:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:27,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:27,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94309954] [2021-07-13 19:42:27,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94309954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:27,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920981055] [2021-07-13 19:42:27,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:27,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:42:27,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:27,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:28,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:42:28,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:28,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:42:28,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:42:28,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:28,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:42:28,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:28,072 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-07-13 19:42:28,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:28,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:42:28,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:28,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:28,109 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:355, output treesize:41 [2021-07-13 19:42:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:28,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920981055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:28,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:28,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:42:28,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424411770] [2021-07-13 19:42:28,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:28,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:28,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:28,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:28,177 INFO L87 Difference]: Start difference. First operand 306 states and 810 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:28,560 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 19:42:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:29,450 INFO L93 Difference]: Finished difference Result 486 states and 1137 transitions. [2021-07-13 19:42:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:42:29,450 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:29,451 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:42:29,451 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:42:29,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1264.5ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:42:29,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:42:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 316. [2021-07-13 19:42:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6698412698412697) internal successors, (841), 315 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 841 transitions. [2021-07-13 19:42:29,455 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 841 transitions. Word has length 18 [2021-07-13 19:42:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:29,455 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 841 transitions. [2021-07-13 19:42:29,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 841 transitions. [2021-07-13 19:42:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:29,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:29,456 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:29,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4447,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:29,656 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1937172667, now seen corresponding path program 268 times [2021-07-13 19:42:29,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:29,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006465722] [2021-07-13 19:42:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:29,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006465722] [2021-07-13 19:42:29,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006465722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789399741] [2021-07-13 19:42:29,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:29,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:29,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:29,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:30,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:30,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:30,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:30,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:30,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:30,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:30,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:42:30,262 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:30,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:30,269 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:42:30,273 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:30,277 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:30,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:30,280 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:30,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:30,308 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:446, output treesize:40 [2021-07-13 19:42:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:30,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789399741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:30,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:30,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:42:30,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38311476] [2021-07-13 19:42:30,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:30,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:30,410 INFO L87 Difference]: Start difference. First operand 316 states and 841 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:30,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:30,762 INFO L93 Difference]: Finished difference Result 418 states and 1010 transitions. [2021-07-13 19:42:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:30,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:30,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:30,763 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:42:30,763 INFO L226 Difference]: Without dead ends: 408 [2021-07-13 19:42:30,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-13 19:42:30,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 322. [2021-07-13 19:42:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6791277258566977) internal successors, (860), 321 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 860 transitions. [2021-07-13 19:42:30,767 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 860 transitions. Word has length 18 [2021-07-13 19:42:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:30,767 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 860 transitions. [2021-07-13 19:42:30,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 860 transitions. [2021-07-13 19:42:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:30,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:30,768 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:30,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4490 [2021-07-13 19:42:30,968 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:30,968 INFO L82 PathProgramCache]: Analyzing trace with hash 200394935, now seen corresponding path program 269 times [2021-07-13 19:42:30,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:30,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123526029] [2021-07-13 19:42:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:31,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:31,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123526029] [2021-07-13 19:42:31,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123526029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:31,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855789274] [2021-07-13 19:42:31,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:31,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:42:31,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:31,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:31,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:31,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:31,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:31,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:31,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:31,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:31,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:31,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:31,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:31,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:31,475 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-07-13 19:42:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:31,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855789274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:31,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:31,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:42:31,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323546233] [2021-07-13 19:42:31,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:42:31,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:31,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:42:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:42:31,572 INFO L87 Difference]: Start difference. First operand 322 states and 860 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:32,131 INFO L93 Difference]: Finished difference Result 412 states and 1001 transitions. [2021-07-13 19:42:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:42:32,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:32,131 INFO L225 Difference]: With dead ends: 412 [2021-07-13 19:42:32,132 INFO L226 Difference]: Without dead ends: 398 [2021-07-13 19:42:32,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:42:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-07-13 19:42:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 320. [2021-07-13 19:42:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6802507836990594) internal successors, (855), 319 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 855 transitions. [2021-07-13 19:42:32,135 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 855 transitions. Word has length 18 [2021-07-13 19:42:32,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:32,135 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 855 transitions. [2021-07-13 19:42:32,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 855 transitions. [2021-07-13 19:42:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:32,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:32,136 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:32,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4563 [2021-07-13 19:42:32,336 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1819939051, now seen corresponding path program 270 times [2021-07-13 19:42:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:32,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679937745] [2021-07-13 19:42:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:32,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:32,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679937745] [2021-07-13 19:42:32,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679937745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:32,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472112669] [2021-07-13 19:42:32,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:32,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:42:32,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:32,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:32,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:32,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:32,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:32,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:32,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:32,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:32,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:32,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:32,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:32,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:32,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:32,755 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-07-13 19:42:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:32,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472112669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:32,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:32,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:42:32,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345427328] [2021-07-13 19:42:32,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:42:32,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:42:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:42:32,857 INFO L87 Difference]: Start difference. First operand 320 states and 855 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:33,313 INFO L93 Difference]: Finished difference Result 370 states and 926 transitions. [2021-07-13 19:42:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:42:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:33,314 INFO L225 Difference]: With dead ends: 370 [2021-07-13 19:42:33,314 INFO L226 Difference]: Without dead ends: 360 [2021-07-13 19:42:33,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 599.2ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:42:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-13 19:42:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 320. [2021-07-13 19:42:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.677115987460815) internal successors, (854), 319 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 854 transitions. [2021-07-13 19:42:33,319 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 854 transitions. Word has length 18 [2021-07-13 19:42:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:33,319 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 854 transitions. [2021-07-13 19:42:33,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 854 transitions. [2021-07-13 19:42:33,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:33,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:33,319 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:33,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4573 [2021-07-13 19:42:33,531 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:33,531 INFO L82 PathProgramCache]: Analyzing trace with hash 738250513, now seen corresponding path program 271 times [2021-07-13 19:42:33,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:33,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924428411] [2021-07-13 19:42:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:33,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:33,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924428411] [2021-07-13 19:42:33,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924428411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:33,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227151069] [2021-07-13 19:42:33,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:33,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:33,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:33,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:33,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:33,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:33,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:33,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:33,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:33,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:33,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:33,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:33,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:33,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:33,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:33,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:33,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:34,042 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:42:34,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:34,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:34,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:34,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:34,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:34,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:34,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:34,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:34,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:34,112 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:42:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:34,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227151069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:34,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:34,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:42:34,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508488572] [2021-07-13 19:42:34,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:34,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:34,209 INFO L87 Difference]: Start difference. First operand 320 states and 854 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:34,740 INFO L93 Difference]: Finished difference Result 373 states and 931 transitions. [2021-07-13 19:42:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:42:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:34,741 INFO L225 Difference]: With dead ends: 373 [2021-07-13 19:42:34,741 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 19:42:34,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:42:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 19:42:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 320. [2021-07-13 19:42:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.677115987460815) internal successors, (854), 319 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 854 transitions. [2021-07-13 19:42:34,744 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 854 transitions. Word has length 18 [2021-07-13 19:42:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:34,744 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 854 transitions. [2021-07-13 19:42:34,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 854 transitions. [2021-07-13 19:42:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:34,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:34,745 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:34,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4582 [2021-07-13 19:42:34,945 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash -577906791, now seen corresponding path program 272 times [2021-07-13 19:42:34,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:34,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965827160] [2021-07-13 19:42:34,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:35,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:35,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965827160] [2021-07-13 19:42:35,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965827160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:35,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908892455] [2021-07-13 19:42:35,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:35,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:35,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:35,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:35,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:35,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:35,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:35,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:35,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:35,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:35,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:35,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:42:35,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:35,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:35,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,580 INFO L628 ElimStorePlain]: treesize reduction 251, result has 23.2 percent of original size [2021-07-13 19:42:35,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:35,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:35,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:35,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:35,613 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:35,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:35,639 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:42:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:35,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908892455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:35,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:35,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:42:35,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667271385] [2021-07-13 19:42:35,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:35,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:35,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:35,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:35,702 INFO L87 Difference]: Start difference. First operand 320 states and 854 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:36,327 INFO L93 Difference]: Finished difference Result 362 states and 916 transitions. [2021-07-13 19:42:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:36,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:36,328 INFO L225 Difference]: With dead ends: 362 [2021-07-13 19:42:36,328 INFO L226 Difference]: Without dead ends: 355 [2021-07-13 19:42:36,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 787.0ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:42:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-13 19:42:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 320. [2021-07-13 19:42:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.677115987460815) internal successors, (854), 319 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 854 transitions. [2021-07-13 19:42:36,331 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 854 transitions. Word has length 18 [2021-07-13 19:42:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:36,332 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 854 transitions. [2021-07-13 19:42:36,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 854 transitions. [2021-07-13 19:42:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:36,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:36,332 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:36,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4607,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:36,533 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1968681979, now seen corresponding path program 273 times [2021-07-13 19:42:36,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:36,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219318102] [2021-07-13 19:42:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:36,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:36,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219318102] [2021-07-13 19:42:36,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219318102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:36,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364160204] [2021-07-13 19:42:36,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:36,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:36,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:36,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:36,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:37,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:37,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:37,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:42:37,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:37,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:37,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:37,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:37,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:42:37,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,265 INFO L628 ElimStorePlain]: treesize reduction 178, result has 30.2 percent of original size [2021-07-13 19:42:37,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:37,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:37,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:37,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-07-13 19:42:37,301 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:37,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:37,329 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:358, output treesize:40 [2021-07-13 19:42:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:37,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364160204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:37,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:37,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:42:37,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681445064] [2021-07-13 19:42:37,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:37,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:37,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:37,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:37,428 INFO L87 Difference]: Start difference. First operand 320 states and 854 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:37,923 INFO L93 Difference]: Finished difference Result 352 states and 901 transitions. [2021-07-13 19:42:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:42:37,923 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:37,924 INFO L225 Difference]: With dead ends: 352 [2021-07-13 19:42:37,924 INFO L226 Difference]: Without dead ends: 342 [2021-07-13 19:42:37,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:42:37,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-07-13 19:42:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 321. [2021-07-13 19:42:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.675) internal successors, (856), 320 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 856 transitions. [2021-07-13 19:42:37,927 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 856 transitions. Word has length 18 [2021-07-13 19:42:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:37,927 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 856 transitions. [2021-07-13 19:42:37,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 856 transitions. [2021-07-13 19:42:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:37,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:37,928 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:38,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4632,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:38,129 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash 231904247, now seen corresponding path program 274 times [2021-07-13 19:42:38,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:38,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344567622] [2021-07-13 19:42:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:38,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:38,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344567622] [2021-07-13 19:42:38,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344567622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:38,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677734252] [2021-07-13 19:42:38,271 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:38,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:38,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:38,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:38,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:38,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:38,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:38,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:38,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:38,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:38,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:38,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:38,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:38,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:38,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,679 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:42:38,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:38,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:38,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:38,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:38,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:38,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:38,741 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:42:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:38,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677734252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:38,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:38,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:42:38,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867929226] [2021-07-13 19:42:38,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:38,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:38,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:38,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:38,836 INFO L87 Difference]: Start difference. First operand 321 states and 856 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:39,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:39,236 INFO L93 Difference]: Finished difference Result 350 states and 902 transitions. [2021-07-13 19:42:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:42:39,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:39,237 INFO L225 Difference]: With dead ends: 350 [2021-07-13 19:42:39,237 INFO L226 Difference]: Without dead ends: 343 [2021-07-13 19:42:39,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:42:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-13 19:42:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2021-07-13 19:42:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-07-13 19:42:39,242 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 18 [2021-07-13 19:42:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:39,242 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-07-13 19:42:39,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-07-13 19:42:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:39,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:39,243 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:39,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4656,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:39,449 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1084253057, now seen corresponding path program 275 times [2021-07-13 19:42:39,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:39,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363770273] [2021-07-13 19:42:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:39,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:39,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363770273] [2021-07-13 19:42:39,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363770273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:39,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087420196] [2021-07-13 19:42:39,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:39,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:39,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:40,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:40,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:40,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:40,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:40,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:40,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:40,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:40,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:40,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:40,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:40,079 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:42:40,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:40,080 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:120, output treesize:41 [2021-07-13 19:42:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:40,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087420196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:40,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:40,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:42:40,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79659876] [2021-07-13 19:42:40,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:42:40,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:40,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:42:40,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:42:40,144 INFO L87 Difference]: Start difference. First operand 324 states and 865 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:40,498 INFO L93 Difference]: Finished difference Result 341 states and 890 transitions. [2021-07-13 19:42:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:42:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:40,499 INFO L225 Difference]: With dead ends: 341 [2021-07-13 19:42:40,499 INFO L226 Difference]: Without dead ends: 334 [2021-07-13 19:42:40,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 679.7ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:42:40,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-07-13 19:42:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 324. [2021-07-13 19:42:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-07-13 19:42:40,502 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 18 [2021-07-13 19:42:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:40,502 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-07-13 19:42:40,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-07-13 19:42:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:40,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:40,503 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:40,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4680 [2021-07-13 19:42:40,703 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1064543479, now seen corresponding path program 276 times [2021-07-13 19:42:40,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:40,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744403827] [2021-07-13 19:42:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:40,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:40,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744403827] [2021-07-13 19:42:40,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744403827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:40,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801432569] [2021-07-13 19:42:40,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:40,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:40,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:40,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:41,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:41,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:41,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:41,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:41,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:41,223 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,257 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:42:41,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:41,258 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:120, output treesize:41 [2021-07-13 19:42:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:41,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801432569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:41,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:41,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:42:41,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918322007] [2021-07-13 19:42:41,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:42:41,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:41,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:42:41,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:42:41,322 INFO L87 Difference]: Start difference. First operand 324 states and 865 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:41,618 INFO L93 Difference]: Finished difference Result 339 states and 887 transitions. [2021-07-13 19:42:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:42:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:41,618 INFO L225 Difference]: With dead ends: 339 [2021-07-13 19:42:41,618 INFO L226 Difference]: Without dead ends: 332 [2021-07-13 19:42:41,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:42:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-13 19:42:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 324. [2021-07-13 19:42:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-07-13 19:42:41,622 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 18 [2021-07-13 19:42:41,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:41,622 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-07-13 19:42:41,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-07-13 19:42:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:41,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:41,622 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:41,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:41,823 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:41,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:41,823 INFO L82 PathProgramCache]: Analyzing trace with hash -843150379, now seen corresponding path program 277 times [2021-07-13 19:42:41,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:41,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572276419] [2021-07-13 19:42:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:41,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:41,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572276419] [2021-07-13 19:42:41,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572276419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:41,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065300905] [2021-07-13 19:42:41,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:42,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:42,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:42,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:42,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:42,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:42,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:42,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:42,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:42,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:42,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:42,191 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:42,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:42,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:42,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:42,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:42,212 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:146, output treesize:40 [2021-07-13 19:42:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:42,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065300905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:42,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:42,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:42:42,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83341373] [2021-07-13 19:42:42,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:42:42,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:42,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:42:42,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:42,300 INFO L87 Difference]: Start difference. First operand 324 states and 865 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:42,613 INFO L93 Difference]: Finished difference Result 357 states and 918 transitions. [2021-07-13 19:42:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:42:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:42,614 INFO L225 Difference]: With dead ends: 357 [2021-07-13 19:42:42,614 INFO L226 Difference]: Without dead ends: 347 [2021-07-13 19:42:42,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-13 19:42:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 328. [2021-07-13 19:42:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.6819571865443423) internal successors, (877), 327 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 877 transitions. [2021-07-13 19:42:42,617 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 877 transitions. Word has length 18 [2021-07-13 19:42:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:42,617 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 877 transitions. [2021-07-13 19:42:42,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 877 transitions. [2021-07-13 19:42:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:42,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:42,618 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:42,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4698,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:42,818 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1715039185, now seen corresponding path program 278 times [2021-07-13 19:42:42,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:42,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354968592] [2021-07-13 19:42:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:43,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:43,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354968592] [2021-07-13 19:42:43,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354968592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:43,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162304967] [2021-07-13 19:42:43,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:43,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:43,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:43,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:43,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:43,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:43,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:43,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,350 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,353 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:43,356 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:43,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:43,374 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:267, output treesize:40 [2021-07-13 19:42:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:43,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162304967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:43,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:43,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:42:43,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849382543] [2021-07-13 19:42:43,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:43,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:43,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:43,474 INFO L87 Difference]: Start difference. First operand 328 states and 877 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:43,832 INFO L93 Difference]: Finished difference Result 356 states and 917 transitions. [2021-07-13 19:42:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:42:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:43,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:43,832 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:42:43,832 INFO L226 Difference]: Without dead ends: 349 [2021-07-13 19:42:43,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 668.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-13 19:42:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 328. [2021-07-13 19:42:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.6819571865443423) internal successors, (877), 327 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 877 transitions. [2021-07-13 19:42:43,836 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 877 transitions. Word has length 18 [2021-07-13 19:42:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:43,836 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 877 transitions. [2021-07-13 19:42:43,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 877 transitions. [2021-07-13 19:42:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:43,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:43,837 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:44,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4709 [2021-07-13 19:42:44,049 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash 398881881, now seen corresponding path program 279 times [2021-07-13 19:42:44,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:44,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791393673] [2021-07-13 19:42:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:44,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:44,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791393673] [2021-07-13 19:42:44,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791393673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:44,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419063855] [2021-07-13 19:42:44,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:44,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:44,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:44,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:44,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:44,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:44,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:44,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:44,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,544 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:42:44,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:44,545 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:96, output treesize:41 [2021-07-13 19:42:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:44,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419063855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:44,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:44,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:42:44,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608640093] [2021-07-13 19:42:44,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:44,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:44,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:44,600 INFO L87 Difference]: Start difference. First operand 328 states and 877 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:44,961 INFO L93 Difference]: Finished difference Result 347 states and 905 transitions. [2021-07-13 19:42:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:42:44,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:44,962 INFO L225 Difference]: With dead ends: 347 [2021-07-13 19:42:44,962 INFO L226 Difference]: Without dead ends: 340 [2021-07-13 19:42:44,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 556.5ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-13 19:42:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2021-07-13 19:42:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.6819571865443423) internal successors, (877), 327 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 877 transitions. [2021-07-13 19:42:44,966 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 877 transitions. Word has length 18 [2021-07-13 19:42:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:44,966 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 877 transitions. [2021-07-13 19:42:44,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 877 transitions. [2021-07-13 19:42:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:44,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:44,966 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:45,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4720,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:45,167 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:45,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1747288879, now seen corresponding path program 280 times [2021-07-13 19:42:45,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:45,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646445792] [2021-07-13 19:42:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:45,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:45,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646445792] [2021-07-13 19:42:45,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646445792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:45,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675152807] [2021-07-13 19:42:45,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:45,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:45,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:45,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:45,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:45,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:45,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:45,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:45,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:45,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:45,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:45,733 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:42:45,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:45,734 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:41 [2021-07-13 19:42:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:45,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675152807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:45,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:45,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:42:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525519192] [2021-07-13 19:42:45,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:45,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:45,797 INFO L87 Difference]: Start difference. First operand 328 states and 877 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:46,075 INFO L93 Difference]: Finished difference Result 347 states and 905 transitions. [2021-07-13 19:42:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:42:46,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:46,076 INFO L225 Difference]: With dead ends: 347 [2021-07-13 19:42:46,076 INFO L226 Difference]: Without dead ends: 340 [2021-07-13 19:42:46,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-13 19:42:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2021-07-13 19:42:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.6819571865443423) internal successors, (877), 327 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 877 transitions. [2021-07-13 19:42:46,079 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 877 transitions. Word has length 18 [2021-07-13 19:42:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:46,079 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 877 transitions. [2021-07-13 19:42:46,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 877 transitions. [2021-07-13 19:42:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:46,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:46,080 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:46,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4732,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:46,280 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:46,281 INFO L82 PathProgramCache]: Analyzing trace with hash 440894297, now seen corresponding path program 281 times [2021-07-13 19:42:46,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:46,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91345349] [2021-07-13 19:42:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:46,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91345349] [2021-07-13 19:42:46,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91345349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:46,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860421488] [2021-07-13 19:42:46,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:46,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:46,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:46,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:46,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:46,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:46,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:46,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:42:46,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:46,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:46,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:46,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:46,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:46,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:46,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:46,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:46,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,062 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-07-13 19:42:47,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:47,066 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:47,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:47,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:47,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:47,124 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:42:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:47,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860421488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:47,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:47,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:42:47,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708579595] [2021-07-13 19:42:47,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:47,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:47,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:47,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:47,187 INFO L87 Difference]: Start difference. First operand 328 states and 877 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:47,440 INFO L93 Difference]: Finished difference Result 345 states and 902 transitions. [2021-07-13 19:42:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:42:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:47,441 INFO L225 Difference]: With dead ends: 345 [2021-07-13 19:42:47,441 INFO L226 Difference]: Without dead ends: 338 [2021-07-13 19:42:47,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-13 19:42:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 330. [2021-07-13 19:42:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.674772036474164) internal successors, (880), 329 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 880 transitions. [2021-07-13 19:42:47,445 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 880 transitions. Word has length 18 [2021-07-13 19:42:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:47,445 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 880 transitions. [2021-07-13 19:42:47,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 880 transitions. [2021-07-13 19:42:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:47,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:47,445 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:47,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4743,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:47,646 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1340879013, now seen corresponding path program 282 times [2021-07-13 19:42:47,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:47,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985952558] [2021-07-13 19:42:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:47,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:47,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985952558] [2021-07-13 19:42:47,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985952558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:47,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131971021] [2021-07-13 19:42:47,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:47,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:42:47,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:48,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:48,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:42:48,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:48,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:48,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:48,380 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:48,384 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:48,387 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:48,391 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:48,394 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:48,405 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:48,409 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:48,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:42:48,412 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:48,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:48,438 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-07-13 19:42:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:48,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131971021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:48,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:48,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:42:48,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222527263] [2021-07-13 19:42:48,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:42:48,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:48,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:42:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:48,508 INFO L87 Difference]: Start difference. First operand 330 states and 880 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:48,903 INFO L93 Difference]: Finished difference Result 446 states and 1083 transitions. [2021-07-13 19:42:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:42:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:48,903 INFO L225 Difference]: With dead ends: 446 [2021-07-13 19:42:48,904 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:42:48,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 666.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:42:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:42:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 355. [2021-07-13 19:42:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.6638418079096047) internal successors, (943), 354 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2021-07-13 19:42:48,907 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 18 [2021-07-13 19:42:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:48,907 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2021-07-13 19:42:48,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2021-07-13 19:42:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:48,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:48,908 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:49,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-07-13 19:42:49,109 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:49,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1838990487, now seen corresponding path program 283 times [2021-07-13 19:42:49,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:49,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279070924] [2021-07-13 19:42:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:49,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:49,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279070924] [2021-07-13 19:42:49,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279070924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:49,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457996421] [2021-07-13 19:42:49,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:49,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:49,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:49,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:49,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:49,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:49,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:49,710 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:49,723 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:49,726 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:49,730 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:49,734 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:49,738 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:42:49,742 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:49,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:42:49,745 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:49,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:49,770 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:444, output treesize:41 [2021-07-13 19:42:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:49,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457996421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:49,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:49,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:42:49,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258369488] [2021-07-13 19:42:49,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:42:49,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:49,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:42:49,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:49,838 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:50,443 INFO L93 Difference]: Finished difference Result 484 states and 1149 transitions. [2021-07-13 19:42:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:42:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:50,444 INFO L225 Difference]: With dead ends: 484 [2021-07-13 19:42:50,444 INFO L226 Difference]: Without dead ends: 477 [2021-07-13 19:42:50,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:42:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-13 19:42:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 358. [2021-07-13 19:42:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.669467787114846) internal successors, (953), 357 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 953 transitions. [2021-07-13 19:42:50,454 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 953 transitions. Word has length 18 [2021-07-13 19:42:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:50,454 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 953 transitions. [2021-07-13 19:42:50,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 953 transitions. [2021-07-13 19:42:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:50,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:50,454 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:50,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4818 [2021-07-13 19:42:50,677 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1799211045, now seen corresponding path program 284 times [2021-07-13 19:42:50,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:50,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289022718] [2021-07-13 19:42:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:50,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:50,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289022718] [2021-07-13 19:42:50,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289022718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:50,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768697451] [2021-07-13 19:42:50,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:50,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:50,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:50,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:50,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:51,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:51,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:42:51,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:51,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:51,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:51,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:51,295 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:51,299 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:51,303 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:51,307 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:51,311 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:51,315 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:51,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:51,318 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,370 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-07-13 19:42:51,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:51,371 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:474, output treesize:41 [2021-07-13 19:42:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:51,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768697451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:51,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:51,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:42:51,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959009285] [2021-07-13 19:42:51,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:42:51,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:51,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:42:51,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:51,444 INFO L87 Difference]: Start difference. First operand 358 states and 953 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:52,205 INFO L93 Difference]: Finished difference Result 495 states and 1172 transitions. [2021-07-13 19:42:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:42:52,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:52,206 INFO L225 Difference]: With dead ends: 495 [2021-07-13 19:42:52,206 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 19:42:52,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 846.6ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:42:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 19:42:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 360. [2021-07-13 19:42:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.6740947075208914) internal successors, (960), 359 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 960 transitions. [2021-07-13 19:42:52,210 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 960 transitions. Word has length 18 [2021-07-13 19:42:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:52,210 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 960 transitions. [2021-07-13 19:42:52,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 960 transitions. [2021-07-13 19:42:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:52,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:52,211 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:52,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4854,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:52,412 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:52,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:52,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2101300247, now seen corresponding path program 285 times [2021-07-13 19:42:52,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:52,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152904135] [2021-07-13 19:42:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:52,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152904135] [2021-07-13 19:42:52,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152904135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:52,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398133460] [2021-07-13 19:42:52,624 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:52,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:52,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:53,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:42:53,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:53,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:42:53,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:53,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:42:53,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:42:53,037 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:53,041 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:42:53,044 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:42:53,048 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:53,052 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:53,055 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:53,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:42:53,058 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:53,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:53,086 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:510, output treesize:40 [2021-07-13 19:42:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398133460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:53,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:53,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:42:53,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274032488] [2021-07-13 19:42:53,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:42:53,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:53,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:42:53,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:42:53,197 INFO L87 Difference]: Start difference. First operand 360 states and 960 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,358 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-13 19:42:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:54,374 INFO L93 Difference]: Finished difference Result 457 states and 1104 transitions. [2021-07-13 19:42:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:42:54,374 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:54,375 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:42:54,375 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 19:42:54,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1275.7ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:42:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 19:42:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 341. [2021-07-13 19:42:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.679411764705882) internal successors, (911), 340 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 911 transitions. [2021-07-13 19:42:54,379 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 911 transitions. Word has length 18 [2021-07-13 19:42:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:54,379 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 911 transitions. [2021-07-13 19:42:54,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 911 transitions. [2021-07-13 19:42:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:54,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:54,380 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:54,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4914 [2021-07-13 19:42:54,580 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash 456889317, now seen corresponding path program 286 times [2021-07-13 19:42:54,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:54,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775859925] [2021-07-13 19:42:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775859925] [2021-07-13 19:42:54,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775859925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173538125] [2021-07-13 19:42:54,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:54,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:54,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:54,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:54,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:55,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:55,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:55,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:42:55,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:42:55,165 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:55,169 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:55,172 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:55,177 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:42:55,181 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:55,185 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:42:55,189 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:42:55,193 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:55,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:42:55,196 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:55,250 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2021-07-13 19:42:55,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:55,251 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:446, output treesize:40 [2021-07-13 19:42:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:55,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173538125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:55,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:55,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:42:55,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455347266] [2021-07-13 19:42:55,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:42:55,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:55,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:42:55,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:42:55,355 INFO L87 Difference]: Start difference. First operand 341 states and 911 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:55,792 INFO L93 Difference]: Finished difference Result 374 states and 966 transitions. [2021-07-13 19:42:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:42:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:55,793 INFO L225 Difference]: With dead ends: 374 [2021-07-13 19:42:55,793 INFO L226 Difference]: Without dead ends: 367 [2021-07-13 19:42:55,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:42:55,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-13 19:42:55,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 341. [2021-07-13 19:42:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.679411764705882) internal successors, (911), 340 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 911 transitions. [2021-07-13 19:42:55,797 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 911 transitions. Word has length 18 [2021-07-13 19:42:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:55,797 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 911 transitions. [2021-07-13 19:42:55,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:55,797 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 911 transitions. [2021-07-13 19:42:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:55,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:55,798 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:55,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4964,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:55,998 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1518967579, now seen corresponding path program 287 times [2021-07-13 19:42:55,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:55,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112094841] [2021-07-13 19:42:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:56,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:56,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112094841] [2021-07-13 19:42:56,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112094841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:56,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539081705] [2021-07-13 19:42:56,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:56,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:42:56,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:56,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:56,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:56,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:56,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:56,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:56,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:56,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:56,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:56,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:56,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:56,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:56,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:56,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:56,433 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-07-13 19:42:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:56,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539081705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:56,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:56,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:42:56,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777389274] [2021-07-13 19:42:56,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:56,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:56,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:56,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:56,500 INFO L87 Difference]: Start difference. First operand 341 states and 911 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:57,129 INFO L93 Difference]: Finished difference Result 452 states and 1116 transitions. [2021-07-13 19:42:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:42:57,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:42:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:57,130 INFO L225 Difference]: With dead ends: 452 [2021-07-13 19:42:57,130 INFO L226 Difference]: Without dead ends: 445 [2021-07-13 19:42:57,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 693.3ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:42:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-13 19:42:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 357. [2021-07-13 19:42:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.696629213483146) internal successors, (960), 356 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 960 transitions. [2021-07-13 19:42:57,134 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 960 transitions. Word has length 18 [2021-07-13 19:42:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:57,134 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 960 transitions. [2021-07-13 19:42:57,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 960 transitions. [2021-07-13 19:42:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:42:57,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:57,135 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:57,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5013 [2021-07-13 19:42:57,335 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:57,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1124511575, now seen corresponding path program 288 times [2021-07-13 19:42:57,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:57,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193610312] [2021-07-13 19:42:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:57,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:57,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193610312] [2021-07-13 19:42:57,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193610312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:57,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098809020] [2021-07-13 19:42:57,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:57,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:42:57,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:57,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:42:57,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:57,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:42:57,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:57,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-07-13 19:42:57,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:57,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:42:57,877 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:57,881 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:42:57,885 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:42:57,889 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:42:57,893 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:42:57,897 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:42:57,901 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:42:57,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:42:57,904 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:57,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:57,931 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:486, output treesize:40 [2021-07-13 19:42:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:58,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098809020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:58,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:58,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:42:58,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859522899] [2021-07-13 19:42:58,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:42:58,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:42:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:58,034 INFO L87 Difference]: Start difference. First operand 357 states and 960 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,969 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-13 19:42:59,098 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-13 19:42:59,474 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-13 19:42:59,730 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-13 19:43:00,213 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-07-13 19:43:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:00,452 INFO L93 Difference]: Finished difference Result 632 states and 1426 transitions. [2021-07-13 19:43:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:43:00,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:00,453 INFO L225 Difference]: With dead ends: 632 [2021-07-13 19:43:00,453 INFO L226 Difference]: Without dead ends: 579 [2021-07-13 19:43:00,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2337.2ms TimeCoverageRelationStatistics Valid=345, Invalid=2105, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:43:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-13 19:43:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 360. [2021-07-13 19:43:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.6963788300835656) internal successors, (968), 359 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 968 transitions. [2021-07-13 19:43:00,460 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 968 transitions. Word has length 18 [2021-07-13 19:43:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:00,460 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 968 transitions. [2021-07-13 19:43:00,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 968 transitions. [2021-07-13 19:43:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:00,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:00,460 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:00,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5023 [2021-07-13 19:43:00,677 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1433677989, now seen corresponding path program 289 times [2021-07-13 19:43:00,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:00,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180636797] [2021-07-13 19:43:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:00,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:00,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180636797] [2021-07-13 19:43:00,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180636797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:00,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431622325] [2021-07-13 19:43:00,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:00,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:00,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:01,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:01,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:01,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:01,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:01,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:01,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:01,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:43:01,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:01,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:01,239 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:01,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:01,244 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:01,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:01,248 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:01,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:43:01,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:01,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:01,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:01,257 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:01,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:01,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:01,289 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:322, output treesize:40 [2021-07-13 19:43:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:01,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431622325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:01,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:01,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:43:01,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667912306] [2021-07-13 19:43:01,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:43:01,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:01,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:43:01,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:01,411 INFO L87 Difference]: Start difference. First operand 360 states and 968 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:01,899 INFO L93 Difference]: Finished difference Result 463 states and 1138 transitions. [2021-07-13 19:43:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:43:01,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:01,900 INFO L225 Difference]: With dead ends: 463 [2021-07-13 19:43:01,900 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:43:01,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 630.6ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:43:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:43:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 360. [2021-07-13 19:43:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.6963788300835656) internal successors, (968), 359 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 968 transitions. [2021-07-13 19:43:01,904 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 968 transitions. Word has length 18 [2021-07-13 19:43:01,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:01,905 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 968 transitions. [2021-07-13 19:43:01,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 968 transitions. [2021-07-13 19:43:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:01,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:01,905 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:02,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5073 [2021-07-13 19:43:02,106 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:02,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:02,106 INFO L82 PathProgramCache]: Analyzing trace with hash -586655997, now seen corresponding path program 290 times [2021-07-13 19:43:02,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:02,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109175868] [2021-07-13 19:43:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:02,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:02,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109175868] [2021-07-13 19:43:02,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109175868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:02,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891567593] [2021-07-13 19:43:02,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:02,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:02,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:02,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:02,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:02,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:02,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:02,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:02,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:02,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:02,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:02,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:02,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,674 INFO L628 ElimStorePlain]: treesize reduction 172, result has 30.9 percent of original size [2021-07-13 19:43:02,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:02,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:02,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:02,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:02,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:02,708 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:02,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:02,735 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-07-13 19:43:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:02,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891567593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:02,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:02,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:43:02,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791362983] [2021-07-13 19:43:02,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:43:02,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:02,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:43:02,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:02,834 INFO L87 Difference]: Start difference. First operand 360 states and 968 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:03,357 INFO L93 Difference]: Finished difference Result 504 states and 1217 transitions. [2021-07-13 19:43:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:43:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:03,358 INFO L225 Difference]: With dead ends: 504 [2021-07-13 19:43:03,358 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 19:43:03,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:43:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 19:43:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 365. [2021-07-13 19:43:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.708791208791209) internal successors, (986), 364 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 986 transitions. [2021-07-13 19:43:03,363 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 986 transitions. Word has length 18 [2021-07-13 19:43:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:03,363 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 986 transitions. [2021-07-13 19:43:03,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 986 transitions. [2021-07-13 19:43:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:03,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:03,363 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:03,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5125,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:03,564 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:03,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1971533567, now seen corresponding path program 291 times [2021-07-13 19:43:03,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:03,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300033430] [2021-07-13 19:43:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:03,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:03,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300033430] [2021-07-13 19:43:03,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300033430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:03,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428747492] [2021-07-13 19:43:03,884 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:03,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:43:03,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:03,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:04,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:04,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:04,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:04,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:04,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:04,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:04,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:04,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:04,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:04,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:04,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:04,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,360 INFO L628 ElimStorePlain]: treesize reduction 232, result has 23.2 percent of original size [2021-07-13 19:43:04,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:04,364 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:04,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:04,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:04,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:04,420 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:442, output treesize:40 [2021-07-13 19:43:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:04,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428747492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:04,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:04,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:43:04,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346155393] [2021-07-13 19:43:04,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:04,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:04,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:04,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:04,525 INFO L87 Difference]: Start difference. First operand 365 states and 986 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,575 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-07-13 19:43:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:05,613 INFO L93 Difference]: Finished difference Result 552 states and 1295 transitions. [2021-07-13 19:43:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:43:05,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:05,614 INFO L225 Difference]: With dead ends: 552 [2021-07-13 19:43:05,614 INFO L226 Difference]: Without dead ends: 538 [2021-07-13 19:43:05,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1249.6ms TimeCoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:43:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-13 19:43:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 367. [2021-07-13 19:43:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.710382513661202) internal successors, (992), 366 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 992 transitions. [2021-07-13 19:43:05,619 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 992 transitions. Word has length 18 [2021-07-13 19:43:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:05,619 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 992 transitions. [2021-07-13 19:43:05,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 992 transitions. [2021-07-13 19:43:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:05,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:05,619 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:05,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5151 [2021-07-13 19:43:05,820 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:05,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:05,820 INFO L82 PathProgramCache]: Analyzing trace with hash 655376263, now seen corresponding path program 292 times [2021-07-13 19:43:05,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:05,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418564852] [2021-07-13 19:43:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:05,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:05,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418564852] [2021-07-13 19:43:05,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418564852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:05,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376583276] [2021-07-13 19:43:05,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:06,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:06,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:06,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:06,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:06,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:06,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:06,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:06,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:06,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:06,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:06,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:06,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:06,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:06,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,439 INFO L628 ElimStorePlain]: treesize reduction 261, result has 23.0 percent of original size [2021-07-13 19:43:06,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:06,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:06,443 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:06,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:06,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:06,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:06,498 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:452, output treesize:41 [2021-07-13 19:43:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:06,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376583276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:06,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:06,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:43:06,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210987845] [2021-07-13 19:43:06,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:43:06,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:06,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:43:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:06,555 INFO L87 Difference]: Start difference. First operand 367 states and 992 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:07,008 INFO L93 Difference]: Finished difference Result 469 states and 1162 transitions. [2021-07-13 19:43:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:43:07,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:07,009 INFO L225 Difference]: With dead ends: 469 [2021-07-13 19:43:07,010 INFO L226 Difference]: Without dead ends: 462 [2021-07-13 19:43:07,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-13 19:43:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 362. [2021-07-13 19:43:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-07-13 19:43:07,014 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-07-13 19:43:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:07,014 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-07-13 19:43:07,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-07-13 19:43:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:07,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:07,014 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:07,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5178 [2021-07-13 19:43:07,215 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:07,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1623312727, now seen corresponding path program 293 times [2021-07-13 19:43:07,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:07,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329073380] [2021-07-13 19:43:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:07,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:07,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329073380] [2021-07-13 19:43:07,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329073380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:07,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95888270] [2021-07-13 19:43:07,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:07,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:07,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:07,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:07,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:07,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:07,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:07,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:07,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:07,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:07,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:07,839 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:07,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:43:07,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:07,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:43:07,847 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:07,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:07,851 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:07,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:07,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:07,854 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:07,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:07,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:07,880 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:325, output treesize:41 [2021-07-13 19:43:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:07,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95888270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:07,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:07,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:43:07,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779158621] [2021-07-13 19:43:07,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:43:07,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:07,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:43:07,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:07,945 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:08,212 INFO L93 Difference]: Finished difference Result 404 states and 1044 transitions. [2021-07-13 19:43:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:08,213 INFO L225 Difference]: With dead ends: 404 [2021-07-13 19:43:08,213 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:43:08,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:43:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 362. [2021-07-13 19:43:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-07-13 19:43:08,216 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-07-13 19:43:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:08,217 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-07-13 19:43:08,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-07-13 19:43:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:08,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:08,217 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:08,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5205,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:08,418 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2014888805, now seen corresponding path program 294 times [2021-07-13 19:43:08,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:08,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683727736] [2021-07-13 19:43:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:08,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:08,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683727736] [2021-07-13 19:43:08,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683727736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:08,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385214324] [2021-07-13 19:43:08,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:08,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:43:08,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:08,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:08,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:08,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:08,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:08,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:08,964 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:08,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:08,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:08,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:08,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:08,979 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:09,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:09,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:09,006 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:343, output treesize:41 [2021-07-13 19:43:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:09,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385214324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:09,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:09,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:43:09,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961871152] [2021-07-13 19:43:09,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:43:09,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:43:09,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:09,071 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:09,628 INFO L93 Difference]: Finished difference Result 407 states and 1049 transitions. [2021-07-13 19:43:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:43:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:09,629 INFO L225 Difference]: With dead ends: 407 [2021-07-13 19:43:09,629 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:43:09,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 651.1ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:43:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 362. [2021-07-13 19:43:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-07-13 19:43:09,633 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-07-13 19:43:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:09,633 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-07-13 19:43:09,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-07-13 19:43:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:09,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:09,633 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:09,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5258 [2021-07-13 19:43:09,834 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1885622487, now seen corresponding path program 295 times [2021-07-13 19:43:09,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:09,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186045214] [2021-07-13 19:43:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:09,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:09,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186045214] [2021-07-13 19:43:09,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186045214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:09,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801887714] [2021-07-13 19:43:09,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:10,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:10,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:10,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:10,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:10,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:10,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:10,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:10,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:10,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:10,393 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:10,397 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:10,414 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:10,418 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:10,421 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:10,424 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:10,428 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:10,432 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:10,435 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:10,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:10,439 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:10,493 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-07-13 19:43:10,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:10,495 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-07-13 19:43:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:10,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801887714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:10,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:10,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:43:10,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856343576] [2021-07-13 19:43:10,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:43:10,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:10,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:43:10,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:10,598 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:11,238 INFO L93 Difference]: Finished difference Result 418 states and 1064 transitions. [2021-07-13 19:43:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:43:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:11,239 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:43:11,239 INFO L226 Difference]: Without dead ends: 411 [2021-07-13 19:43:11,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 740.2ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:43:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-07-13 19:43:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 362. [2021-07-13 19:43:11,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-07-13 19:43:11,243 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-07-13 19:43:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:11,243 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-07-13 19:43:11,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-07-13 19:43:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:11,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:11,243 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:11,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5317,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:11,444 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:11,444 INFO L82 PathProgramCache]: Analyzing trace with hash 672567077, now seen corresponding path program 296 times [2021-07-13 19:43:11,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:11,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687851492] [2021-07-13 19:43:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:11,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687851492] [2021-07-13 19:43:11,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687851492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896700320] [2021-07-13 19:43:11,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:11,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:11,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:12,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:12,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:12,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:12,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:12,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:12,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:12,039 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:12,042 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:12,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:43:12,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:12,054 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:43:12,058 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:12,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:12,061 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:12,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:12,088 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:446, output treesize:40 [2021-07-13 19:43:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:12,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896700320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:12,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:12,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:43:12,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415792976] [2021-07-13 19:43:12,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:43:12,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:12,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:43:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:12,189 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:12,897 INFO L93 Difference]: Finished difference Result 406 states and 1046 transitions. [2021-07-13 19:43:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:43:12,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:12,898 INFO L225 Difference]: With dead ends: 406 [2021-07-13 19:43:12,898 INFO L226 Difference]: Without dead ends: 399 [2021-07-13 19:43:12,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 820.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:43:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-13 19:43:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 362. [2021-07-13 19:43:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-07-13 19:43:12,901 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-07-13 19:43:12,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:12,901 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-07-13 19:43:12,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-07-13 19:43:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:12,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:12,902 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:13,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5365 [2021-07-13 19:43:13,103 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1303289819, now seen corresponding path program 297 times [2021-07-13 19:43:13,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:13,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374284272] [2021-07-13 19:43:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:13,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:13,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374284272] [2021-07-13 19:43:13,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374284272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:13,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40781256] [2021-07-13 19:43:13,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:13,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:13,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:13,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:13,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:13,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:43:13,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:13,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:13,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:43:13,724 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:43:13,729 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:13,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:43:13,738 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:13,742 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-07-13 19:43:13,747 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:13,750 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:13,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:43:13,754 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:13,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:13,782 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:492, output treesize:41 [2021-07-13 19:43:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:13,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40781256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:13,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:13,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:43:13,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783961137] [2021-07-13 19:43:13,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:13,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:13,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:13,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:13,860 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:15,691 INFO L93 Difference]: Finished difference Result 566 states and 1345 transitions. [2021-07-13 19:43:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:43:15,691 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:15,692 INFO L225 Difference]: With dead ends: 566 [2021-07-13 19:43:15,692 INFO L226 Difference]: Without dead ends: 526 [2021-07-13 19:43:15,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1872.9ms TimeCoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:43:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-13 19:43:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 389. [2021-07-13 19:43:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.7087628865979383) internal successors, (1051), 388 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1051 transitions. [2021-07-13 19:43:15,697 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1051 transitions. Word has length 18 [2021-07-13 19:43:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:15,697 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1051 transitions. [2021-07-13 19:43:15,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1051 transitions. [2021-07-13 19:43:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:15,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:15,697 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:15,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5438 [2021-07-13 19:43:15,898 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:15,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:15,898 INFO L82 PathProgramCache]: Analyzing trace with hash -908833815, now seen corresponding path program 298 times [2021-07-13 19:43:15,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:15,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629889632] [2021-07-13 19:43:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:16,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629889632] [2021-07-13 19:43:16,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629889632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534751301] [2021-07-13 19:43:16,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:16,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:16,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:16,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:16,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:16,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:16,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:16,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:16,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:43:16,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:16,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:43:16,394 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:16,398 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:16,401 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:16,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:16,405 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:16,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:16,432 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:322, output treesize:40 [2021-07-13 19:43:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534751301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:16,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:43:16,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699927716] [2021-07-13 19:43:16,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:43:16,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:43:16,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:16,539 INFO L87 Difference]: Start difference. First operand 389 states and 1051 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:17,035 INFO L93 Difference]: Finished difference Result 498 states and 1241 transitions. [2021-07-13 19:43:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:17,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:17,036 INFO L225 Difference]: With dead ends: 498 [2021-07-13 19:43:17,036 INFO L226 Difference]: Without dead ends: 488 [2021-07-13 19:43:17,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 622.1ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:43:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-13 19:43:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 395. [2021-07-13 19:43:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.715736040609137) internal successors, (1070), 394 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1070 transitions. [2021-07-13 19:43:17,041 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1070 transitions. Word has length 18 [2021-07-13 19:43:17,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:17,041 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1070 transitions. [2021-07-13 19:43:17,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,041 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1070 transitions. [2021-07-13 19:43:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:17,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:17,041 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:17,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5471,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:17,242 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:17,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1649355749, now seen corresponding path program 299 times [2021-07-13 19:43:17,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:17,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704948700] [2021-07-13 19:43:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:17,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:17,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704948700] [2021-07-13 19:43:17,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704948700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:17,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809646314] [2021-07-13 19:43:17,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:17,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:43:17,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:17,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:17,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:17,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:17,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:17,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:17,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:17,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:17,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:17,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:17,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:17,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:17,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:17,626 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:17,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:17,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:17,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:17,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:17,647 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:180, output treesize:40 [2021-07-13 19:43:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:17,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809646314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:17,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:17,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:43:17,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497279618] [2021-07-13 19:43:17,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:17,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:17,763 INFO L87 Difference]: Start difference. First operand 395 states and 1070 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:18,356 INFO L93 Difference]: Finished difference Result 522 states and 1311 transitions. [2021-07-13 19:43:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:18,357 INFO L225 Difference]: With dead ends: 522 [2021-07-13 19:43:18,357 INFO L226 Difference]: Without dead ends: 515 [2021-07-13 19:43:18,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:43:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-13 19:43:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 414. [2021-07-13 19:43:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.736077481840194) internal successors, (1130), 413 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1130 transitions. [2021-07-13 19:43:18,363 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1130 transitions. Word has length 18 [2021-07-13 19:43:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:18,364 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 1130 transitions. [2021-07-13 19:43:18,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1130 transitions. [2021-07-13 19:43:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:18,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:18,364 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:18,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5521,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:18,581 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash -370978237, now seen corresponding path program 300 times [2021-07-13 19:43:18,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:18,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150525225] [2021-07-13 19:43:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:43:18,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:18,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150525225] [2021-07-13 19:43:18,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150525225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:18,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326429658] [2021-07-13 19:43:18,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:18,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:18,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:18,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:18,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:18,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:18,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:18,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:18,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:18,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:18,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:19,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:19,010 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:141, output treesize:40 [2021-07-13 19:43:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:19,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326429658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:19,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:19,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:43:19,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541867318] [2021-07-13 19:43:19,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:19,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:19,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:19,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:19,113 INFO L87 Difference]: Start difference. First operand 414 states and 1130 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:19,733 INFO L93 Difference]: Finished difference Result 520 states and 1304 transitions. [2021-07-13 19:43:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:19,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:19,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:19,734 INFO L225 Difference]: With dead ends: 520 [2021-07-13 19:43:19,734 INFO L226 Difference]: Without dead ends: 510 [2021-07-13 19:43:19,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:43:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-13 19:43:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 414. [2021-07-13 19:43:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.7336561743341403) internal successors, (1129), 413 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1129 transitions. [2021-07-13 19:43:19,738 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1129 transitions. Word has length 18 [2021-07-13 19:43:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:19,738 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 1129 transitions. [2021-07-13 19:43:19,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1129 transitions. [2021-07-13 19:43:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:19,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:19,739 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:19,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5529,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:19,940 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:19,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2107755969, now seen corresponding path program 301 times [2021-07-13 19:43:19,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:19,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91638504] [2021-07-13 19:43:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:43:20,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91638504] [2021-07-13 19:43:20,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91638504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292553151] [2021-07-13 19:43:20,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:20,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:20,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:20,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:20,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:20,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:20,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:20,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:20,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,580 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-07-13 19:43:20,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:20,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:20,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:20,614 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:20,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:20,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:20,640 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:43:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:20,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292553151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:20,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:20,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:43:20,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342914457] [2021-07-13 19:43:20,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:43:20,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:20,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:43:20,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:20,739 INFO L87 Difference]: Start difference. First operand 414 states and 1129 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:21,288 INFO L93 Difference]: Finished difference Result 500 states and 1269 transitions. [2021-07-13 19:43:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:21,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:21,290 INFO L225 Difference]: With dead ends: 500 [2021-07-13 19:43:21,290 INFO L226 Difference]: Without dead ends: 493 [2021-07-13 19:43:21,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:43:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-13 19:43:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 412. [2021-07-13 19:43:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.72992700729927) internal successors, (1122), 411 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1122 transitions. [2021-07-13 19:43:21,294 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1122 transitions. Word has length 18 [2021-07-13 19:43:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:21,294 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1122 transitions. [2021-07-13 19:43:21,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1122 transitions. [2021-07-13 19:43:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:21,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:21,295 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:21,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-07-13 19:43:21,495 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash 871054023, now seen corresponding path program 302 times [2021-07-13 19:43:21,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:21,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105821796] [2021-07-13 19:43:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:43:21,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:21,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105821796] [2021-07-13 19:43:21,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105821796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:21,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726555986] [2021-07-13 19:43:21,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:21,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:21,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:21,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:21,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:21,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:21,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:21,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:21,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:21,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:22,079 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-07-13 19:43:22,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:22,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:22,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:22,111 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:22,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:22,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:22,136 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:43:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:22,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726555986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:22,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:22,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 19:43:22,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87488095] [2021-07-13 19:43:22,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:43:22,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:43:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:22,207 INFO L87 Difference]: Start difference. First operand 412 states and 1122 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:22,770 INFO L93 Difference]: Finished difference Result 480 states and 1234 transitions. [2021-07-13 19:43:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:43:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:22,771 INFO L225 Difference]: With dead ends: 480 [2021-07-13 19:43:22,771 INFO L226 Difference]: Without dead ends: 473 [2021-07-13 19:43:22,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 694.7ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:43:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-13 19:43:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 416. [2021-07-13 19:43:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.7228915662650603) internal successors, (1130), 415 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1130 transitions. [2021-07-13 19:43:22,776 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1130 transitions. Word has length 18 [2021-07-13 19:43:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:22,776 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1130 transitions. [2021-07-13 19:43:22,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1130 transitions. [2021-07-13 19:43:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:22,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:22,777 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:22,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5564 [2021-07-13 19:43:22,977 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash -877324503, now seen corresponding path program 303 times [2021-07-13 19:43:22,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:22,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86908431] [2021-07-13 19:43:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:23,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:23,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86908431] [2021-07-13 19:43:23,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86908431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:23,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28207166] [2021-07-13 19:43:23,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:23,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:23,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:23,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:23,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:23,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:23,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:23,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:23,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:23,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:43:23,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:23,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:23,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:43:23,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:23,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:23,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,646 INFO L628 ElimStorePlain]: treesize reduction 263, result has 22.6 percent of original size [2021-07-13 19:43:23,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-13 19:43:23,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:23,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:23,680 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:23,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:23,707 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:488, output treesize:40 [2021-07-13 19:43:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:23,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28207166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:23,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:23,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:43:23,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002621302] [2021-07-13 19:43:23,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:43:23,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:43:23,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:23,813 INFO L87 Difference]: Start difference. First operand 416 states and 1130 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:24,900 INFO L93 Difference]: Finished difference Result 573 states and 1398 transitions. [2021-07-13 19:43:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:43:24,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:24,901 INFO L225 Difference]: With dead ends: 573 [2021-07-13 19:43:24,901 INFO L226 Difference]: Without dead ends: 556 [2021-07-13 19:43:24,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1222.6ms TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:43:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-07-13 19:43:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 427. [2021-07-13 19:43:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.73943661971831) internal successors, (1167), 426 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1167 transitions. [2021-07-13 19:43:24,906 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1167 transitions. Word has length 18 [2021-07-13 19:43:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:24,906 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1167 transitions. [2021-07-13 19:43:24,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1167 transitions. [2021-07-13 19:43:24,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:24,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:24,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:25,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5588,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:25,107 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:25,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1680865061, now seen corresponding path program 304 times [2021-07-13 19:43:25,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:25,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361735208] [2021-07-13 19:43:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:25,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:25,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361735208] [2021-07-13 19:43:25,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361735208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:25,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218392259] [2021-07-13 19:43:25,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:25,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:25,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:25,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:25,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:25,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:25,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:25,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:25,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:25,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:25,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:25,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:25,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:25,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:25,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:25,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:25,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,735 INFO L628 ElimStorePlain]: treesize reduction 258, result has 21.8 percent of original size [2021-07-13 19:43:25,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:25,739 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:25,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:25,769 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:25,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:25,796 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:43:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:25,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218392259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:25,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:25,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:43:25,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797191826] [2021-07-13 19:43:25,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:43:25,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:25,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:43:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:25,907 INFO L87 Difference]: Start difference. First operand 427 states and 1167 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:26,679 INFO L93 Difference]: Finished difference Result 573 states and 1402 transitions. [2021-07-13 19:43:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:43:26,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:26,680 INFO L225 Difference]: With dead ends: 573 [2021-07-13 19:43:26,681 INFO L226 Difference]: Without dead ends: 559 [2021-07-13 19:43:26,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 818.9ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:43:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-13 19:43:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 429. [2021-07-13 19:43:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.7383177570093458) internal successors, (1172), 428 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1172 transitions. [2021-07-13 19:43:26,685 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1172 transitions. Word has length 18 [2021-07-13 19:43:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:26,685 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1172 transitions. [2021-07-13 19:43:26,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1172 transitions. [2021-07-13 19:43:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:26,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:26,686 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:26,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5616 [2021-07-13 19:43:26,886 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:26,887 INFO L82 PathProgramCache]: Analyzing trace with hash 364707757, now seen corresponding path program 305 times [2021-07-13 19:43:26,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:26,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785492064] [2021-07-13 19:43:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:27,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:27,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785492064] [2021-07-13 19:43:27,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785492064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:27,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718602300] [2021-07-13 19:43:27,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:27,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:43:27,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:27,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:27,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:27,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:27,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:27,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:27,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:27,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:27,477 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:41 [2021-07-13 19:43:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:27,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718602300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:27,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:27,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:43:27,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64460460] [2021-07-13 19:43:27,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:43:27,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:27,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:43:27,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:27,562 INFO L87 Difference]: Start difference. First operand 429 states and 1172 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:28,321 INFO L93 Difference]: Finished difference Result 591 states and 1452 transitions. [2021-07-13 19:43:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:43:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:28,322 INFO L225 Difference]: With dead ends: 591 [2021-07-13 19:43:28,322 INFO L226 Difference]: Without dead ends: 577 [2021-07-13 19:43:28,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 892.3ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:43:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-13 19:43:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 437. [2021-07-13 19:43:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.7522935779816513) internal successors, (1200), 436 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1200 transitions. [2021-07-13 19:43:28,328 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1200 transitions. Word has length 18 [2021-07-13 19:43:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:28,328 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1200 transitions. [2021-07-13 19:43:28,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,328 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1200 transitions. [2021-07-13 19:43:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:28,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:28,329 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:28,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5642,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:28,529 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:28,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1781463003, now seen corresponding path program 306 times [2021-07-13 19:43:28,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:28,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590480027] [2021-07-13 19:43:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:28,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:28,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590480027] [2021-07-13 19:43:28,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590480027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:28,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822563187] [2021-07-13 19:43:28,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:28,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:43:28,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:28,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:28,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:29,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:43:29,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:29,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:43:29,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:29,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:29,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:29,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:43:29,423 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:29,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:43:29,432 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:43:29,437 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:43:29,441 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:29,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:43:29,445 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,513 INFO L628 ElimStorePlain]: treesize reduction 27, result has 74.0 percent of original size [2021-07-13 19:43:29,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:29,516 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:566, output treesize:41 [2021-07-13 19:43:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:29,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822563187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:29,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:29,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:43:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88422093] [2021-07-13 19:43:29,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:29,590 INFO L87 Difference]: Start difference. First operand 437 states and 1200 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,230 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-07-13 19:43:30,700 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-07-13 19:43:31,281 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-07-13 19:43:31,705 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-07-13 19:43:31,885 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-07-13 19:43:32,162 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-13 19:43:32,329 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-07-13 19:43:32,509 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-13 19:43:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:32,648 INFO L93 Difference]: Finished difference Result 692 states and 1620 transitions. [2021-07-13 19:43:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:43:32,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:32,650 INFO L225 Difference]: With dead ends: 692 [2021-07-13 19:43:32,650 INFO L226 Difference]: Without dead ends: 640 [2021-07-13 19:43:32,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2955.3ms TimeCoverageRelationStatistics Valid=251, Invalid=2005, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:43:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-13 19:43:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 448. [2021-07-13 19:43:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.756152125279642) internal successors, (1232), 447 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1232 transitions. [2021-07-13 19:43:32,655 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1232 transitions. Word has length 18 [2021-07-13 19:43:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:32,656 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1232 transitions. [2021-07-13 19:43:32,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1232 transitions. [2021-07-13 19:43:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:32,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:32,656 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:32,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5654,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:32,857 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:32,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2035187715, now seen corresponding path program 307 times [2021-07-13 19:43:32,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:32,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520210222] [2021-07-13 19:43:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:33,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520210222] [2021-07-13 19:43:33,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520210222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727919881] [2021-07-13 19:43:33,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:33,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:33,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:33,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:33,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:33,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:33,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:33,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:33,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:33,611 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:33,615 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:33,619 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:33,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:33,622 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:33,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:33,647 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:343, output treesize:41 [2021-07-13 19:43:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727919881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:33,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:43:33,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87358820] [2021-07-13 19:43:33,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:33,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:33,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:33,716 INFO L87 Difference]: Start difference. First operand 448 states and 1232 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:34,129 INFO L93 Difference]: Finished difference Result 544 states and 1399 transitions. [2021-07-13 19:43:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:43:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:34,130 INFO L225 Difference]: With dead ends: 544 [2021-07-13 19:43:34,130 INFO L226 Difference]: Without dead ends: 530 [2021-07-13 19:43:34,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:43:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-13 19:43:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 461. [2021-07-13 19:43:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.760869565217391) internal successors, (1270), 460 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1270 transitions. [2021-07-13 19:43:34,135 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1270 transitions. Word has length 18 [2021-07-13 19:43:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:34,135 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1270 transitions. [2021-07-13 19:43:34,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1270 transitions. [2021-07-13 19:43:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:34,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:34,136 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:34,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5722,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:34,345 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:34,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1378421951, now seen corresponding path program 308 times [2021-07-13 19:43:34,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:34,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219199852] [2021-07-13 19:43:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:34,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:34,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219199852] [2021-07-13 19:43:34,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219199852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:34,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116015410] [2021-07-13 19:43:34,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:34,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:34,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:34,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:34,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:35,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:35,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:35,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:35,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:35,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:35,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:35,062 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:35,065 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:35,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:35,073 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:35,077 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:35,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:35,081 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:35,083 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:35,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:35,109 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:474, output treesize:41 [2021-07-13 19:43:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:35,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116015410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:35,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:35,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:43:35,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396700673] [2021-07-13 19:43:35,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:35,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:35,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:35,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:35,177 INFO L87 Difference]: Start difference. First operand 461 states and 1270 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:35,899 INFO L93 Difference]: Finished difference Result 563 states and 1434 transitions. [2021-07-13 19:43:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:43:35,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:35,900 INFO L225 Difference]: With dead ends: 563 [2021-07-13 19:43:35,901 INFO L226 Difference]: Without dead ends: 549 [2021-07-13 19:43:35,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 920.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:43:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-07-13 19:43:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 463. [2021-07-13 19:43:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.764069264069264) internal successors, (1277), 462 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1277 transitions. [2021-07-13 19:43:35,906 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1277 transitions. Word has length 18 [2021-07-13 19:43:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:35,906 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1277 transitions. [2021-07-13 19:43:35,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1277 transitions. [2021-07-13 19:43:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:35,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:35,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:36,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5784 [2021-07-13 19:43:36,107 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:36,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1772877955, now seen corresponding path program 309 times [2021-07-13 19:43:36,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:36,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336240977] [2021-07-13 19:43:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:36,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:36,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336240977] [2021-07-13 19:43:36,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336240977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:36,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838941874] [2021-07-13 19:43:36,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:36,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:43:36,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:36,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:36,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:36,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:36,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:43:36,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:43:36,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:43:36,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:43:36,686 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:43:36,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:43:36,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:43:36,700 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:36,704 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:36,707 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:43:36,711 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:36,715 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:36,719 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:36,723 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:36,726 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:36,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:36,729 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,783 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-07-13 19:43:36,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:36,784 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:40 [2021-07-13 19:43:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:36,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838941874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:36,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:36,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:43:36,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258302686] [2021-07-13 19:43:36,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:43:36,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:36,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:43:36,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:36,894 INFO L87 Difference]: Start difference. First operand 463 states and 1277 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,903 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 19:43:38,033 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-13 19:43:38,286 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-13 19:43:38,403 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-13 19:43:38,553 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-13 19:43:38,704 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-13 19:43:38,868 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-07-13 19:43:39,051 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-07-13 19:43:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:39,084 INFO L93 Difference]: Finished difference Result 683 states and 1695 transitions. [2021-07-13 19:43:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:43:39,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:39,085 INFO L225 Difference]: With dead ends: 683 [2021-07-13 19:43:39,086 INFO L226 Difference]: Without dead ends: 631 [2021-07-13 19:43:39,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2203.4ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:43:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-13 19:43:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 468. [2021-07-13 19:43:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.7516059957173447) internal successors, (1285), 467 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1285 transitions. [2021-07-13 19:43:39,091 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1285 transitions. Word has length 18 [2021-07-13 19:43:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:39,091 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1285 transitions. [2021-07-13 19:43:39,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1285 transitions. [2021-07-13 19:43:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:39,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:39,092 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:39,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5838 [2021-07-13 19:43:39,292 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash 36100223, now seen corresponding path program 310 times [2021-07-13 19:43:39,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:39,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685188225] [2021-07-13 19:43:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:39,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685188225] [2021-07-13 19:43:39,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685188225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500653617] [2021-07-13 19:43:39,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:39,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:39,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:39,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:39,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:39,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:39,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:39,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:39,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:39,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:39,996 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:39,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:39,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:40,002 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:40,006 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:40,010 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:40,014 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:40,018 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:40,022 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:40,025 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:40,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:40,029 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:40,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:40,056 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-07-13 19:43:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:40,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500653617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:40,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:40,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:43:40,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953472315] [2021-07-13 19:43:40,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:40,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:40,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:40,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:40,159 INFO L87 Difference]: Start difference. First operand 468 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:40,689 INFO L93 Difference]: Finished difference Result 509 states and 1347 transitions. [2021-07-13 19:43:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:40,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:40,690 INFO L225 Difference]: With dead ends: 509 [2021-07-13 19:43:40,690 INFO L226 Difference]: Without dead ends: 502 [2021-07-13 19:43:40,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 798.3ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-13 19:43:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 468. [2021-07-13 19:43:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.7516059957173447) internal successors, (1285), 467 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1285 transitions. [2021-07-13 19:43:40,694 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1285 transitions. Word has length 18 [2021-07-13 19:43:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:40,695 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1285 transitions. [2021-07-13 19:43:40,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1285 transitions. [2021-07-13 19:43:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:40,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:40,695 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:40,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5888,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:40,896 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash 67609535, now seen corresponding path program 311 times [2021-07-13 19:43:40,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:40,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932279575] [2021-07-13 19:43:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:41,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:41,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932279575] [2021-07-13 19:43:41,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932279575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:41,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111956179] [2021-07-13 19:43:41,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:41,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:43:41,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:41,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:41,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:41,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:41,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:41,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:41,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:41,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:41,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:41,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:41,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:41,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:41,330 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:43:41,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:41,331 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-07-13 19:43:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:41,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111956179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:41,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:41,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:43:41,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569054559] [2021-07-13 19:43:41,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:41,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:41,432 INFO L87 Difference]: Start difference. First operand 468 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:41,980 INFO L93 Difference]: Finished difference Result 535 states and 1383 transitions. [2021-07-13 19:43:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:43:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:41,981 INFO L225 Difference]: With dead ends: 535 [2021-07-13 19:43:41,981 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 19:43:41,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 688.3ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:43:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 19:43:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 468. [2021-07-13 19:43:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.7516059957173447) internal successors, (1285), 467 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1285 transitions. [2021-07-13 19:43:41,986 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1285 transitions. Word has length 18 [2021-07-13 19:43:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:41,987 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1285 transitions. [2021-07-13 19:43:41,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1285 transitions. [2021-07-13 19:43:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:41,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:41,987 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:42,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5937 [2021-07-13 19:43:42,201 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1939756673, now seen corresponding path program 312 times [2021-07-13 19:43:42,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:42,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397289769] [2021-07-13 19:43:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:42,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397289769] [2021-07-13 19:43:42,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397289769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390433822] [2021-07-13 19:43:42,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:42,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:43:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:42,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:42,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:43:42,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:42,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:42,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:43:42,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:43:42,809 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:42,813 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:43:42,817 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:43:42,821 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-07-13 19:43:42,825 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:42,828 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:42,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:43:42,831 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:42,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:42,857 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:492, output treesize:41 [2021-07-13 19:43:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390433822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:42,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:43:42,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995270091] [2021-07-13 19:43:42,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:42,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:42,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:42,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:42,919 INFO L87 Difference]: Start difference. First operand 468 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:44,216 INFO L93 Difference]: Finished difference Result 626 states and 1589 transitions. [2021-07-13 19:43:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:43:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:44,218 INFO L225 Difference]: With dead ends: 626 [2021-07-13 19:43:44,218 INFO L226 Difference]: Without dead ends: 600 [2021-07-13 19:43:44,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1333.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:43:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-13 19:43:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 471. [2021-07-13 19:43:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.751063829787234) internal successors, (1293), 470 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1293 transitions. [2021-07-13 19:43:44,224 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1293 transitions. Word has length 18 [2021-07-13 19:43:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:44,225 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1293 transitions. [2021-07-13 19:43:44,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1293 transitions. [2021-07-13 19:43:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:44,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:44,226 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:44,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5946,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:44,448 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1545300669, now seen corresponding path program 313 times [2021-07-13 19:43:44,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:44,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497146344] [2021-07-13 19:43:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:44,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:44,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497146344] [2021-07-13 19:43:44,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497146344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:44,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415305022] [2021-07-13 19:43:44,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:44,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:44,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:44,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:44,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:44,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:44,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:44,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:44,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:44,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:44,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:44,986 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:44,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:44,990 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:44,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:43:44,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:44,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:44,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:44,999 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:45,003 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:45,007 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:45,011 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:45,015 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:43:45,019 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:45,022 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:45,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:45,025 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:45,028 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:45,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:45,055 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:40 [2021-07-13 19:43:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:45,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415305022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:45,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:45,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:43:45,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151568980] [2021-07-13 19:43:45,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:43:45,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:43:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:45,152 INFO L87 Difference]: Start difference. First operand 471 states and 1293 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:45,588 INFO L93 Difference]: Finished difference Result 541 states and 1391 transitions. [2021-07-13 19:43:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:43:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:45,589 INFO L225 Difference]: With dead ends: 541 [2021-07-13 19:43:45,589 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 19:43:45,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 504.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 19:43:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 470. [2021-07-13 19:43:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.746268656716418) internal successors, (1288), 469 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1288 transitions. [2021-07-13 19:43:45,594 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1288 transitions. Word has length 18 [2021-07-13 19:43:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:45,594 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1288 transitions. [2021-07-13 19:43:45,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1288 transitions. [2021-07-13 19:43:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:45,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:45,595 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:45,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5978,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:45,795 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1550744473, now seen corresponding path program 314 times [2021-07-13 19:43:45,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:45,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477224819] [2021-07-13 19:43:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:43:46,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:46,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477224819] [2021-07-13 19:43:46,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477224819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:46,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053189582] [2021-07-13 19:43:46,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:46,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:46,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:46,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:46,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:46,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:46,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:46,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:46,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:46,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:46,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:46,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:46,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:46,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:46,401 INFO L628 ElimStorePlain]: treesize reduction 162, result has 31.6 percent of original size [2021-07-13 19:43:46,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:46,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:46,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:46,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:46,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:46,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:46,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:46,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:46,463 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-07-13 19:43:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:46,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053189582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:46,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:46,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:43:46,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111498607] [2021-07-13 19:43:46,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:43:46,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:46,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:43:46,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:46,559 INFO L87 Difference]: Start difference. First operand 470 states and 1288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:47,246 INFO L93 Difference]: Finished difference Result 500 states and 1332 transitions. [2021-07-13 19:43:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:43:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:47,247 INFO L225 Difference]: With dead ends: 500 [2021-07-13 19:43:47,247 INFO L226 Difference]: Without dead ends: 493 [2021-07-13 19:43:47,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 882.1ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-13 19:43:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 470. [2021-07-13 19:43:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.746268656716418) internal successors, (1288), 469 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1288 transitions. [2021-07-13 19:43:47,254 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1288 transitions. Word has length 18 [2021-07-13 19:43:47,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:47,255 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1288 transitions. [2021-07-13 19:43:47,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1288 transitions. [2021-07-13 19:43:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:47,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:47,255 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:47,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6051 [2021-07-13 19:43:47,480 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:47,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1513791357, now seen corresponding path program 315 times [2021-07-13 19:43:47,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:47,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713840711] [2021-07-13 19:43:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:47,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:47,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713840711] [2021-07-13 19:43:47,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713840711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:47,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219090377] [2021-07-13 19:43:47,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:47,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:43:47,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:47,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:48,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:48,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:48,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:43:48,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:48,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:48,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:43:48,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:48,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:48,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:48,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:48,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:48,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,356 INFO L628 ElimStorePlain]: treesize reduction 261, result has 24.1 percent of original size [2021-07-13 19:43:48,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:48,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-07-13 19:43:48,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:48,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-07-13 19:43:48,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:48,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:48,420 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:494, output treesize:40 [2021-07-13 19:43:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:48,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219090377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:48,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:48,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:43:48,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017083390] [2021-07-13 19:43:48,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:43:48,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:48,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:43:48,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:48,524 INFO L87 Difference]: Start difference. First operand 470 states and 1288 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:49,360 INFO L93 Difference]: Finished difference Result 532 states and 1381 transitions. [2021-07-13 19:43:49,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:43:49,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:49,361 INFO L225 Difference]: With dead ends: 532 [2021-07-13 19:43:49,361 INFO L226 Difference]: Without dead ends: 522 [2021-07-13 19:43:49,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1193.5ms TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:43:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-07-13 19:43:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 468. [2021-07-13 19:43:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.7451820128479656) internal successors, (1282), 467 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1282 transitions. [2021-07-13 19:43:49,366 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1282 transitions. Word has length 18 [2021-07-13 19:43:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:49,366 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1282 transitions. [2021-07-13 19:43:49,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1282 transitions. [2021-07-13 19:43:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:49,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:49,367 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:49,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6076 [2021-07-13 19:43:49,567 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1044398207, now seen corresponding path program 316 times [2021-07-13 19:43:49,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:49,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724450264] [2021-07-13 19:43:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:49,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:49,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724450264] [2021-07-13 19:43:49,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724450264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:49,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269719696] [2021-07-13 19:43:49,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:49,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:49,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:49,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:49,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:50,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:50,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:50,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:50,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:50,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:50,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:50,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:50,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:50,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:50,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:50,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,154 INFO L628 ElimStorePlain]: treesize reduction 243, result has 24.1 percent of original size [2021-07-13 19:43:50,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:50,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:50,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:50,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:50,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:50,214 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:43:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:50,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269719696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:50,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:50,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:43:50,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811373697] [2021-07-13 19:43:50,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:43:50,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:50,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:43:50,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:43:50,315 INFO L87 Difference]: Start difference. First operand 468 states and 1282 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:50,971 INFO L93 Difference]: Finished difference Result 523 states and 1365 transitions. [2021-07-13 19:43:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:43:50,971 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:50,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:50,972 INFO L225 Difference]: With dead ends: 523 [2021-07-13 19:43:50,972 INFO L226 Difference]: Without dead ends: 516 [2021-07-13 19:43:50,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 784.5ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-07-13 19:43:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 469. [2021-07-13 19:43:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.7457264957264957) internal successors, (1285), 468 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1285 transitions. [2021-07-13 19:43:50,977 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1285 transitions. Word has length 18 [2021-07-13 19:43:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:50,977 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1285 transitions. [2021-07-13 19:43:50,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1285 transitions. [2021-07-13 19:43:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:50,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:50,978 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:51,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6101 [2021-07-13 19:43:51,178 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:51,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:51,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1877037439, now seen corresponding path program 317 times [2021-07-13 19:43:51,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:51,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763447597] [2021-07-13 19:43:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:51,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:51,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763447597] [2021-07-13 19:43:51,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763447597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:51,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881101723] [2021-07-13 19:43:51,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:51,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:51,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:51,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:51,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:51,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:51,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:51,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:51,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:51,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:51,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:51,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:51,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:51,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:51,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:51,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:51,955 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-07-13 19:43:51,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:51,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:51,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:51,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:51,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:52,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:52,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:52,013 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:43:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:52,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881101723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:52,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:52,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:43:52,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418125385] [2021-07-13 19:43:52,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:52,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:52,082 INFO L87 Difference]: Start difference. First operand 469 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:52,420 INFO L93 Difference]: Finished difference Result 504 states and 1337 transitions. [2021-07-13 19:43:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:52,422 INFO L225 Difference]: With dead ends: 504 [2021-07-13 19:43:52,422 INFO L226 Difference]: Without dead ends: 497 [2021-07-13 19:43:52,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:43:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-07-13 19:43:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 469. [2021-07-13 19:43:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.7457264957264957) internal successors, (1285), 468 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1285 transitions. [2021-07-13 19:43:52,426 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1285 transitions. Word has length 18 [2021-07-13 19:43:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:52,427 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1285 transitions. [2021-07-13 19:43:52,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1285 transitions. [2021-07-13 19:43:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:52,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:52,427 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:52,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6127,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:52,628 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1087753445, now seen corresponding path program 318 times [2021-07-13 19:43:52,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:52,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218556957] [2021-07-13 19:43:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:52,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:52,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218556957] [2021-07-13 19:43:52,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218556957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:52,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330956294] [2021-07-13 19:43:52,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:52,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:43:52,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:52,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:53,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:43:53,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:53,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:53,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:53,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:53,197 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:43:53,201 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:53,205 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:53,208 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:53,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:53,211 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:53,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:53,238 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:325, output treesize:41 [2021-07-13 19:43:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330956294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:53,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:43:53,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470141706] [2021-07-13 19:43:53,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:43:53,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:53,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:43:53,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:53,293 INFO L87 Difference]: Start difference. First operand 469 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,729 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-13 19:43:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:54,776 INFO L93 Difference]: Finished difference Result 654 states and 1635 transitions. [2021-07-13 19:43:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:43:54,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:54,777 INFO L225 Difference]: With dead ends: 654 [2021-07-13 19:43:54,777 INFO L226 Difference]: Without dead ends: 631 [2021-07-13 19:43:54,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1440.6ms TimeCoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:43:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-13 19:43:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 475. [2021-07-13 19:43:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 2.740506329113924) internal successors, (1299), 474 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1299 transitions. [2021-07-13 19:43:54,783 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1299 transitions. Word has length 18 [2021-07-13 19:43:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:54,783 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1299 transitions. [2021-07-13 19:43:54,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1299 transitions. [2021-07-13 19:43:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:54,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:54,784 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:54,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6154,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:54,984 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:54,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1482209449, now seen corresponding path program 319 times [2021-07-13 19:43:54,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:54,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486505278] [2021-07-13 19:43:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:55,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:55,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486505278] [2021-07-13 19:43:55,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486505278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:55,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052009347] [2021-07-13 19:43:55,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:55,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:55,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:55,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:55,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:55,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:55,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:55,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:55,597 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:55,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:55,605 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:55,610 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:55,619 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:55,624 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:55,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:55,632 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:55,636 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:55,639 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:55,643 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:55,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:55,647 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,704 INFO L628 ElimStorePlain]: treesize reduction 65, result has 47.2 percent of original size [2021-07-13 19:43:55,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:55,705 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-07-13 19:43:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:55,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052009347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:55,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:55,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:43:55,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434554897] [2021-07-13 19:43:55,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:43:55,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:43:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:55,803 INFO L87 Difference]: Start difference. First operand 475 states and 1299 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:56,163 INFO L93 Difference]: Finished difference Result 558 states and 1433 transitions. [2021-07-13 19:43:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:56,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:56,164 INFO L225 Difference]: With dead ends: 558 [2021-07-13 19:43:56,164 INFO L226 Difference]: Without dead ends: 548 [2021-07-13 19:43:56,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-07-13 19:43:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 480. [2021-07-13 19:43:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.7453027139874737) internal successors, (1315), 479 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1315 transitions. [2021-07-13 19:43:56,169 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1315 transitions. Word has length 18 [2021-07-13 19:43:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:56,169 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1315 transitions. [2021-07-13 19:43:56,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1315 transitions. [2021-07-13 19:43:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:56,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:56,170 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:56,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6191 [2021-07-13 19:43:56,370 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash -254568283, now seen corresponding path program 320 times [2021-07-13 19:43:56,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:56,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825059928] [2021-07-13 19:43:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:56,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:56,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825059928] [2021-07-13 19:43:56,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825059928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:56,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904440146] [2021-07-13 19:43:56,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:56,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:56,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:56,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:56,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:56,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:56,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:56,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:56,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:56,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:43:56,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:56,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:56,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:56,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:56,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:56,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:56,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:57,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:57,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:57,009 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:43:57,013 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:57,017 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:43:57,021 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:57,026 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:57,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:43:57,029 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,083 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-07-13 19:43:57,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:57,084 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:440, output treesize:40 [2021-07-13 19:43:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:57,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904440146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:57,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:57,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:43:57,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415816964] [2021-07-13 19:43:57,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:43:57,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:57,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:43:57,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:43:57,182 INFO L87 Difference]: Start difference. First operand 480 states and 1315 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:57,528 INFO L93 Difference]: Finished difference Result 546 states and 1416 transitions. [2021-07-13 19:43:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:57,529 INFO L225 Difference]: With dead ends: 546 [2021-07-13 19:43:57,529 INFO L226 Difference]: Without dead ends: 539 [2021-07-13 19:43:57,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:43:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-13 19:43:57,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 478. [2021-07-13 19:43:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.742138364779874) internal successors, (1308), 477 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1308 transitions. [2021-07-13 19:43:57,534 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1308 transitions. Word has length 18 [2021-07-13 19:43:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:57,534 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1308 transitions. [2021-07-13 19:43:57,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1308 transitions. [2021-07-13 19:43:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:57,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:57,535 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:57,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6263 [2021-07-13 19:43:57,735 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2020065027, now seen corresponding path program 321 times [2021-07-13 19:43:57,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:57,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228574519] [2021-07-13 19:43:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:57,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:57,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228574519] [2021-07-13 19:43:57,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228574519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:57,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194783382] [2021-07-13 19:43:57,894 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:57,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:43:57,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:57,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:57,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:58,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:58,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:58,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:43:58,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:58,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:58,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:58,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:58,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:58,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:58,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:58,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:43:58,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:58,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:58,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:43:58,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:58,329 INFO L628 ElimStorePlain]: treesize reduction 263, result has 23.5 percent of original size [2021-07-13 19:43:58,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:58,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-07-13 19:43:58,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:58,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:58,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:58,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-07-13 19:43:58,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:58,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:58,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:58,392 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:494, output treesize:40 [2021-07-13 19:43:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:58,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194783382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:58,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:58,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:43:58,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999553897] [2021-07-13 19:43:58,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:43:58,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:58,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:43:58,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:58,491 INFO L87 Difference]: Start difference. First operand 478 states and 1308 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:59,103 INFO L93 Difference]: Finished difference Result 550 states and 1433 transitions. [2021-07-13 19:43:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:43:59,103 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:43:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:59,104 INFO L225 Difference]: With dead ends: 550 [2021-07-13 19:43:59,104 INFO L226 Difference]: Without dead ends: 540 [2021-07-13 19:43:59,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 737.8ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:43:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-13 19:43:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 488. [2021-07-13 19:43:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.7412731006160165) internal successors, (1335), 487 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1335 transitions. [2021-07-13 19:43:59,109 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1335 transitions. Word has length 18 [2021-07-13 19:43:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:59,109 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1335 transitions. [2021-07-13 19:43:59,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:59,109 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1335 transitions. [2021-07-13 19:43:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:43:59,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:59,110 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:59,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6325,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,310 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:59,311 INFO L82 PathProgramCache]: Analyzing trace with hash 283287295, now seen corresponding path program 322 times [2021-07-13 19:43:59,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:59,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516269990] [2021-07-13 19:43:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:59,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:59,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516269990] [2021-07-13 19:43:59,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516269990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:59,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780839939] [2021-07-13 19:43:59,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:59,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:59,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:43:59,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:59,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:59,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:59,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:43:59,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:59,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:59,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:43:59,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:59,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:43:59,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,842 INFO L628 ElimStorePlain]: treesize reduction 162, result has 31.6 percent of original size [2021-07-13 19:43:59,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:59,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:59,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:43:59,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:59,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:43:59,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:59,912 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-07-13 19:44:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:00,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780839939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:00,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:00,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:00,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448674202] [2021-07-13 19:44:00,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:00,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:00,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:00,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:00,010 INFO L87 Difference]: Start difference. First operand 488 states and 1335 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:00,512 INFO L93 Difference]: Finished difference Result 535 states and 1405 transitions. [2021-07-13 19:44:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:00,513 INFO L225 Difference]: With dead ends: 535 [2021-07-13 19:44:00,513 INFO L226 Difference]: Without dead ends: 528 [2021-07-13 19:44:00,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 632.7ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:44:00,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-13 19:44:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 488. [2021-07-13 19:44:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.7412731006160165) internal successors, (1335), 487 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1335 transitions. [2021-07-13 19:44:00,518 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1335 transitions. Word has length 18 [2021-07-13 19:44:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:00,518 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1335 transitions. [2021-07-13 19:44:00,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1335 transitions. [2021-07-13 19:44:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:00,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:00,519 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:00,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6349,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:00,719 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:00,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1032870009, now seen corresponding path program 323 times [2021-07-13 19:44:00,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:00,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979106917] [2021-07-13 19:44:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:00,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:00,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979106917] [2021-07-13 19:44:00,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979106917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:00,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833682857] [2021-07-13 19:44:00,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:00,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:44:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:00,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:01,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:01,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:01,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:01,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:01,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:01,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,192 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:44:01,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:01,192 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-07-13 19:44:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:01,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833682857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:01,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:01,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:01,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463706379] [2021-07-13 19:44:01,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:01,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:01,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:01,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:01,260 INFO L87 Difference]: Start difference. First operand 488 states and 1335 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:01,874 INFO L93 Difference]: Finished difference Result 524 states and 1390 transitions. [2021-07-13 19:44:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:44:01,874 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:01,875 INFO L225 Difference]: With dead ends: 524 [2021-07-13 19:44:01,875 INFO L226 Difference]: Without dead ends: 517 [2021-07-13 19:44:01,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 726.8ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:44:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-13 19:44:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 485. [2021-07-13 19:44:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.7417355371900825) internal successors, (1327), 484 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1327 transitions. [2021-07-13 19:44:01,880 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1327 transitions. Word has length 18 [2021-07-13 19:44:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:01,880 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1327 transitions. [2021-07-13 19:44:01,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1327 transitions. [2021-07-13 19:44:01,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:01,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:01,881 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:02,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6375 [2021-07-13 19:44:02,081 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1513718761, now seen corresponding path program 324 times [2021-07-13 19:44:02,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:02,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173708372] [2021-07-13 19:44:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:02,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:02,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173708372] [2021-07-13 19:44:02,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173708372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:02,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177893830] [2021-07-13 19:44:02,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:02,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:02,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:02,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:02,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:02,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:02,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:44:02,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:02,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:02,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:02,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:02,654 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-07-13 19:44:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:02,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177893830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:02,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:02,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:02,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149323428] [2021-07-13 19:44:02,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:02,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:02,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:02,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:02,759 INFO L87 Difference]: Start difference. First operand 485 states and 1327 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:03,232 INFO L93 Difference]: Finished difference Result 516 states and 1376 transitions. [2021-07-13 19:44:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:03,233 INFO L225 Difference]: With dead ends: 516 [2021-07-13 19:44:03,233 INFO L226 Difference]: Without dead ends: 506 [2021-07-13 19:44:03,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 796.2ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:44:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-13 19:44:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 487. [2021-07-13 19:44:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.742798353909465) internal successors, (1333), 486 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1333 transitions. [2021-07-13 19:44:03,238 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1333 transitions. Word has length 18 [2021-07-13 19:44:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:03,238 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1333 transitions. [2021-07-13 19:44:03,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1333 transitions. [2021-07-13 19:44:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:03,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:03,239 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:03,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6385 [2021-07-13 19:44:03,439 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash -223058971, now seen corresponding path program 325 times [2021-07-13 19:44:03,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:03,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842692665] [2021-07-13 19:44:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:03,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:03,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842692665] [2021-07-13 19:44:03,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842692665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:03,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326670641] [2021-07-13 19:44:03,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:03,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:03,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:04,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:04,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:04,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:04,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:04,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:04,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:04,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:04,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:04,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:04,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:04,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:04,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:44:04,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:04,392 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-07-13 19:44:04,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:04,396 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:04,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:04,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:44:04,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:04,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:04,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:04,452 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:44:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:04,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326670641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:04,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:04,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:04,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370405042] [2021-07-13 19:44:04,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:04,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:04,551 INFO L87 Difference]: Start difference. First operand 487 states and 1333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:05,030 INFO L93 Difference]: Finished difference Result 515 states and 1375 transitions. [2021-07-13 19:44:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:05,031 INFO L225 Difference]: With dead ends: 515 [2021-07-13 19:44:05,031 INFO L226 Difference]: Without dead ends: 508 [2021-07-13 19:44:05,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 913.1ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:44:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-13 19:44:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 487. [2021-07-13 19:44:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.742798353909465) internal successors, (1333), 486 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1333 transitions. [2021-07-13 19:44:05,036 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1333 transitions. Word has length 18 [2021-07-13 19:44:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:05,036 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1333 transitions. [2021-07-13 19:44:05,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1333 transitions. [2021-07-13 19:44:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:05,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:05,037 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:05,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6396,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:05,237 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:05,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1539216275, now seen corresponding path program 326 times [2021-07-13 19:44:05,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:05,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177018294] [2021-07-13 19:44:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:05,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:05,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177018294] [2021-07-13 19:44:05,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177018294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:05,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925911779] [2021-07-13 19:44:05,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:05,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:05,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:05,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:05,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:05,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:05,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:05,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:05,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:05,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:05,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:05,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:05,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:05,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,980 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-07-13 19:44:05,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:05,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:06,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:06,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:06,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:06,013 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:06,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:06,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:06,038 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:44:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:06,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925911779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:06,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:06,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:06,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410627333] [2021-07-13 19:44:06,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:06,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:06,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:06,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:06,104 INFO L87 Difference]: Start difference. First operand 487 states and 1333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:06,587 INFO L93 Difference]: Finished difference Result 505 states and 1360 transitions. [2021-07-13 19:44:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:06,589 INFO L225 Difference]: With dead ends: 505 [2021-07-13 19:44:06,589 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:44:06,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 760.4ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:44:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:44:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 487. [2021-07-13 19:44:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.742798353909465) internal successors, (1333), 486 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1333 transitions. [2021-07-13 19:44:06,598 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1333 transitions. Word has length 18 [2021-07-13 19:44:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:06,598 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1333 transitions. [2021-07-13 19:44:06,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1333 transitions. [2021-07-13 19:44:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:06,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:06,599 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:06,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6421 [2021-07-13 19:44:06,799 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:06,800 INFO L82 PathProgramCache]: Analyzing trace with hash 609580261, now seen corresponding path program 327 times [2021-07-13 19:44:06,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:06,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542203782] [2021-07-13 19:44:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:06,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:06,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542203782] [2021-07-13 19:44:06,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542203782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:06,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892963537] [2021-07-13 19:44:06,955 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:07,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:07,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:07,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:07,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:07,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:07,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:07,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:07,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:07,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:07,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:07,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:07,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:07,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:07,393 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-07-13 19:44:07,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:07,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:07,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:07,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:07,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:07,427 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:07,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:07,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:07,459 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:44:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:07,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892963537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:07,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:07,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:07,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519049139] [2021-07-13 19:44:07,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:07,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:07,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:07,526 INFO L87 Difference]: Start difference. First operand 487 states and 1333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:07,877 INFO L93 Difference]: Finished difference Result 503 states and 1357 transitions. [2021-07-13 19:44:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:07,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:07,878 INFO L225 Difference]: With dead ends: 503 [2021-07-13 19:44:07,878 INFO L226 Difference]: Without dead ends: 496 [2021-07-13 19:44:07,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-13 19:44:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 487. [2021-07-13 19:44:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.742798353909465) internal successors, (1333), 486 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1333 transitions. [2021-07-13 19:44:07,883 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1333 transitions. Word has length 18 [2021-07-13 19:44:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:07,883 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1333 transitions. [2021-07-13 19:44:07,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1333 transitions. [2021-07-13 19:44:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:07,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:07,884 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:08,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6448,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:08,085 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1298113597, now seen corresponding path program 328 times [2021-07-13 19:44:08,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:08,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829264294] [2021-07-13 19:44:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:08,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:08,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829264294] [2021-07-13 19:44:08,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829264294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:08,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012825074] [2021-07-13 19:44:08,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:08,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:08,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:08,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:08,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:08,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:08,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:08,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:08,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:08,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:08,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:44:08,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:08,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:08,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:08,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:08,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:08,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,720 INFO L628 ElimStorePlain]: treesize reduction 243, result has 24.1 percent of original size [2021-07-13 19:44:08,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:08,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:08,724 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:08,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:08,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:08,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:08,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:08,782 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:44:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:08,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012825074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:08,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:08,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:08,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581179491] [2021-07-13 19:44:08,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:08,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:08,885 INFO L87 Difference]: Start difference. First operand 487 states and 1333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:09,354 INFO L93 Difference]: Finished difference Result 521 states and 1388 transitions. [2021-07-13 19:44:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:44:09,354 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:09,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:09,355 INFO L225 Difference]: With dead ends: 521 [2021-07-13 19:44:09,355 INFO L226 Difference]: Without dead ends: 511 [2021-07-13 19:44:09,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-13 19:44:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 490. [2021-07-13 19:44:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.7443762781186094) internal successors, (1342), 489 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1342 transitions. [2021-07-13 19:44:09,360 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1342 transitions. Word has length 18 [2021-07-13 19:44:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:09,360 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1342 transitions. [2021-07-13 19:44:09,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1342 transitions. [2021-07-13 19:44:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:09,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:09,361 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:09,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6467,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:09,576 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:09,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1260075967, now seen corresponding path program 329 times [2021-07-13 19:44:09,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:09,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427248547] [2021-07-13 19:44:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:09,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:09,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427248547] [2021-07-13 19:44:09,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427248547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:09,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256602493] [2021-07-13 19:44:09,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:09,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:09,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:09,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:09,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:10,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:10,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:10,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:44:10,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:10,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:10,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,108 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:44:10,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:10,108 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-07-13 19:44:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:10,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256602493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:10,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:10,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:10,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153622484] [2021-07-13 19:44:10,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:10,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:10,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:10,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:10,217 INFO L87 Difference]: Start difference. First operand 490 states and 1342 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:10,733 INFO L93 Difference]: Finished difference Result 520 states and 1387 transitions. [2021-07-13 19:44:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:44:10,733 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:10,734 INFO L225 Difference]: With dead ends: 520 [2021-07-13 19:44:10,734 INFO L226 Difference]: Without dead ends: 513 [2021-07-13 19:44:10,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 732.4ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:44:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-13 19:44:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 490. [2021-07-13 19:44:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.7443762781186094) internal successors, (1342), 489 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1342 transitions. [2021-07-13 19:44:10,740 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1342 transitions. Word has length 18 [2021-07-13 19:44:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:10,740 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1342 transitions. [2021-07-13 19:44:10,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1342 transitions. [2021-07-13 19:44:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:10,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:10,741 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:10,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6491,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:10,965 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:10,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash -56081337, now seen corresponding path program 330 times [2021-07-13 19:44:10,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:10,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955557122] [2021-07-13 19:44:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:11,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955557122] [2021-07-13 19:44:11,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955557122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420304271] [2021-07-13 19:44:11,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:11,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:11,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:11,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:11,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:11,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:11,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:44:11,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:11,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:11,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:11,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:11,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:11,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:11,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:11,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:41 [2021-07-13 19:44:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:11,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420304271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:11,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:11,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:11,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768297455] [2021-07-13 19:44:11,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:11,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:11,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:11,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:11,582 INFO L87 Difference]: Start difference. First operand 490 states and 1342 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:12,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:12,039 INFO L93 Difference]: Finished difference Result 510 states and 1372 transitions. [2021-07-13 19:44:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:12,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:12,040 INFO L225 Difference]: With dead ends: 510 [2021-07-13 19:44:12,040 INFO L226 Difference]: Without dead ends: 503 [2021-07-13 19:44:12,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 710.3ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:44:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-13 19:44:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 489. [2021-07-13 19:44:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.7438524590163933) internal successors, (1339), 488 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1339 transitions. [2021-07-13 19:44:12,045 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1339 transitions. Word has length 18 [2021-07-13 19:44:12,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:12,045 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1339 transitions. [2021-07-13 19:44:12,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1339 transitions. [2021-07-13 19:44:12,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:12,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:12,046 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:12,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6501,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:12,246 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:12,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2092715199, now seen corresponding path program 331 times [2021-07-13 19:44:12,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:12,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498882282] [2021-07-13 19:44:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:12,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:12,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498882282] [2021-07-13 19:44:12,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498882282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:12,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959514287] [2021-07-13 19:44:12,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:12,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:12,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:12,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:12,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:12,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:12,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:12,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:12,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:12,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:12,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:44:12,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,913 INFO L628 ElimStorePlain]: treesize reduction 154, result has 31.6 percent of original size [2021-07-13 19:44:12,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:44:12,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:12,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:12,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:12,970 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:44:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:13,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959514287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:13,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:13,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:13,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591493419] [2021-07-13 19:44:13,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:13,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:13,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:13,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:13,041 INFO L87 Difference]: Start difference. First operand 489 states and 1339 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:13,410 INFO L93 Difference]: Finished difference Result 509 states and 1369 transitions. [2021-07-13 19:44:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:13,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:13,411 INFO L225 Difference]: With dead ends: 509 [2021-07-13 19:44:13,411 INFO L226 Difference]: Without dead ends: 502 [2021-07-13 19:44:13,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 581.1ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-13 19:44:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 489. [2021-07-13 19:44:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.7438524590163933) internal successors, (1339), 488 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1339 transitions. [2021-07-13 19:44:13,416 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1339 transitions. Word has length 18 [2021-07-13 19:44:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:13,416 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1339 transitions. [2021-07-13 19:44:13,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1339 transitions. [2021-07-13 19:44:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:13,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:13,417 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:13,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6510 [2021-07-13 19:44:13,618 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:13,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:13,618 INFO L82 PathProgramCache]: Analyzing trace with hash -14068921, now seen corresponding path program 332 times [2021-07-13 19:44:13,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:13,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860075377] [2021-07-13 19:44:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:13,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:13,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860075377] [2021-07-13 19:44:13,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860075377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:13,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103056119] [2021-07-13 19:44:13,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:13,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:13,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:13,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:14,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:14,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:14,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:14,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:14,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:14,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:14,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:14,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:14,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,326 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-07-13 19:44:14,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:14,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:14,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:14,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:14,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:14,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:14,385 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:44:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:14,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103056119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:14,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:14,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:14,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530832737] [2021-07-13 19:44:14,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:14,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:14,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:14,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:14,452 INFO L87 Difference]: Start difference. First operand 489 states and 1339 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:14,750 INFO L93 Difference]: Finished difference Result 507 states and 1366 transitions. [2021-07-13 19:44:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:14,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:14,751 INFO L225 Difference]: With dead ends: 507 [2021-07-13 19:44:14,751 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 19:44:14,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 19:44:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 489. [2021-07-13 19:44:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.7438524590163933) internal successors, (1339), 488 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1339 transitions. [2021-07-13 19:44:14,756 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1339 transitions. Word has length 18 [2021-07-13 19:44:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:14,756 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1339 transitions. [2021-07-13 19:44:14,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1339 transitions. [2021-07-13 19:44:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:14,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:14,757 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:14,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6535,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:14,958 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:14,958 INFO L82 PathProgramCache]: Analyzing trace with hash -784162003, now seen corresponding path program 333 times [2021-07-13 19:44:14,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:14,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649725740] [2021-07-13 19:44:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:15,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649725740] [2021-07-13 19:44:15,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649725740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491406614] [2021-07-13 19:44:15,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:15,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:44:15,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:15,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:15,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:15,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:44:15,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:15,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:15,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:44:15,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:15,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:15,868 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:44:15,872 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:44:15,876 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:44:15,880 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:15,883 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:15,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:44:15,886 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:15,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:15,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:15,911 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:516, output treesize:41 [2021-07-13 19:44:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:15,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491406614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:15,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:15,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:15,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573629148] [2021-07-13 19:44:15,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:15,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:15,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:15,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:15,978 INFO L87 Difference]: Start difference. First operand 489 states and 1339 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:16,548 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-07-13 19:44:17,295 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-07-13 19:44:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:17,644 INFO L93 Difference]: Finished difference Result 714 states and 1771 transitions. [2021-07-13 19:44:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:44:17,644 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:17,645 INFO L225 Difference]: With dead ends: 714 [2021-07-13 19:44:17,645 INFO L226 Difference]: Without dead ends: 688 [2021-07-13 19:44:17,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1865.3ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:44:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-07-13 19:44:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 499. [2021-07-13 19:44:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.7610441767068274) internal successors, (1375), 498 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1375 transitions. [2021-07-13 19:44:17,651 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1375 transitions. Word has length 18 [2021-07-13 19:44:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:17,651 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1375 transitions. [2021-07-13 19:44:17,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1375 transitions. [2021-07-13 19:44:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:17,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:17,653 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:17,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6562,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:17,869 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:17,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1440927767, now seen corresponding path program 334 times [2021-07-13 19:44:17,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:17,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643560260] [2021-07-13 19:44:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:18,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:18,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643560260] [2021-07-13 19:44:18,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643560260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:18,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931592335] [2021-07-13 19:44:18,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:18,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:18,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:18,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:18,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:18,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:18,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:18,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:44:18,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:18,642 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:44:18,646 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:18,650 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:18,654 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:44:18,658 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:44:18,662 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:18,666 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:18,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:18,669 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,720 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-07-13 19:44:18,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:18,722 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-07-13 19:44:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931592335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:18,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:18,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:18,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795002968] [2021-07-13 19:44:18,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:18,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:18,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:18,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:18,773 INFO L87 Difference]: Start difference. First operand 499 states and 1375 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:19,375 INFO L93 Difference]: Finished difference Result 614 states and 1565 transitions. [2021-07-13 19:44:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:44:19,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:19,376 INFO L225 Difference]: With dead ends: 614 [2021-07-13 19:44:19,376 INFO L226 Difference]: Without dead ends: 588 [2021-07-13 19:44:19,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 811.7ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:44:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-13 19:44:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 502. [2021-07-13 19:44:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7624750499001998) internal successors, (1384), 501 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1384 transitions. [2021-07-13 19:44:19,382 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1384 transitions. Word has length 18 [2021-07-13 19:44:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:19,382 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1384 transitions. [2021-07-13 19:44:19,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1384 transitions. [2021-07-13 19:44:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:19,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:19,383 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:19,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6617,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:19,583 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1046471763, now seen corresponding path program 335 times [2021-07-13 19:44:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:19,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765304764] [2021-07-13 19:44:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:19,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:19,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765304764] [2021-07-13 19:44:19,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765304764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:19,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054344272] [2021-07-13 19:44:19,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:19,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:44:19,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:19,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:19,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:20,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:20,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:20,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:44:20,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:20,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:20,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:20,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:20,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:20,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:20,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:20,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:20,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:20,199 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-07-13 19:44:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:20,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054344272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:20,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:20,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:20,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396644338] [2021-07-13 19:44:20,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:20,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:20,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:20,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:20,310 INFO L87 Difference]: Start difference. First operand 502 states and 1384 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:21,094 INFO L93 Difference]: Finished difference Result 627 states and 1584 transitions. [2021-07-13 19:44:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:44:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:21,095 INFO L225 Difference]: With dead ends: 627 [2021-07-13 19:44:21,095 INFO L226 Difference]: Without dead ends: 606 [2021-07-13 19:44:21,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1059.5ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:44:21,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-07-13 19:44:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 504. [2021-07-13 19:44:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.7673956262425445) internal successors, (1392), 503 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1392 transitions. [2021-07-13 19:44:21,101 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1392 transitions. Word has length 18 [2021-07-13 19:44:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:21,102 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1392 transitions. [2021-07-13 19:44:21,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1392 transitions. [2021-07-13 19:44:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:21,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:21,103 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:21,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6678 [2021-07-13 19:44:21,325 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:21,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1511717801, now seen corresponding path program 336 times [2021-07-13 19:44:21,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:21,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033256155] [2021-07-13 19:44:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:21,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:21,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033256155] [2021-07-13 19:44:21,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033256155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:21,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036322711] [2021-07-13 19:44:21,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:21,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:21,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:21,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:21,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:21,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:21,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:21,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:21,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:21,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:21,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:21,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:21,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:21,798 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:44:21,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:21,799 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-07-13 19:44:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:21,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036322711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:21,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:21,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:21,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921146301] [2021-07-13 19:44:21,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:21,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:21,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:21,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:21,903 INFO L87 Difference]: Start difference. First operand 504 states and 1392 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:22,746 INFO L93 Difference]: Finished difference Result 597 states and 1537 transitions. [2021-07-13 19:44:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:44:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:22,747 INFO L225 Difference]: With dead ends: 597 [2021-07-13 19:44:22,748 INFO L226 Difference]: Without dead ends: 576 [2021-07-13 19:44:22,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 888.3ms TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:44:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-13 19:44:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 504. [2021-07-13 19:44:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.7673956262425445) internal successors, (1392), 503 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1392 transitions. [2021-07-13 19:44:22,753 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1392 transitions. Word has length 18 [2021-07-13 19:44:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:22,753 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1392 transitions. [2021-07-13 19:44:22,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1392 transitions. [2021-07-13 19:44:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:22,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:22,754 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:22,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6687,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:22,954 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:22,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1014962451, now seen corresponding path program 337 times [2021-07-13 19:44:22,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:22,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271149427] [2021-07-13 19:44:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:23,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:23,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271149427] [2021-07-13 19:44:23,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271149427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:23,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037075150] [2021-07-13 19:44:23,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:23,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:23,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:23,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:23,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:23,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:23,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:23,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:23,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:44:23,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:23,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:23,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:23,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:23,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:23,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:23,508 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-07-13 19:44:23,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:44:23,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:23,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:23,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:23,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:23,544 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:23,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:23,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:23,571 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:44:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:23,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037075150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:23,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:23,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:44:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335190042] [2021-07-13 19:44:23,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:23,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:23,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:23,669 INFO L87 Difference]: Start difference. First operand 504 states and 1392 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:24,165 INFO L93 Difference]: Finished difference Result 605 states and 1565 transitions. [2021-07-13 19:44:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:44:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:24,166 INFO L225 Difference]: With dead ends: 605 [2021-07-13 19:44:24,166 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 19:44:24,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 576.0ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 19:44:24,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 509. [2021-07-13 19:44:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.77755905511811) internal successors, (1411), 508 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1411 transitions. [2021-07-13 19:44:24,172 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1411 transitions. Word has length 18 [2021-07-13 19:44:24,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:24,172 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1411 transitions. [2021-07-13 19:44:24,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1411 transitions. [2021-07-13 19:44:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:24,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:24,172 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:24,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6697 [2021-07-13 19:44:24,373 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1543227113, now seen corresponding path program 338 times [2021-07-13 19:44:24,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:24,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078743915] [2021-07-13 19:44:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:24,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:24,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078743915] [2021-07-13 19:44:24,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078743915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:24,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201726450] [2021-07-13 19:44:24,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:24,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:24,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:24,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:24,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:24,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:24,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:24,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:24,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:24,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:24,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:24,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:24,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:24,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:24,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:24,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:24,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:24,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:24,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:25,017 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:44:25,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:25,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:25,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:25,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:25,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:25,052 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:25,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:25,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:25,079 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:44:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:25,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201726450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:25,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:25,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:44:25,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683845830] [2021-07-13 19:44:25,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:25,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:25,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:25,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:25,142 INFO L87 Difference]: Start difference. First operand 509 states and 1411 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,551 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-07-13 19:44:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:25,575 INFO L93 Difference]: Finished difference Result 589 states and 1541 transitions. [2021-07-13 19:44:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:44:25,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:25,576 INFO L225 Difference]: With dead ends: 589 [2021-07-13 19:44:25,576 INFO L226 Difference]: Without dead ends: 582 [2021-07-13 19:44:25,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 566.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-07-13 19:44:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 507. [2021-07-13 19:44:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.772727272727273) internal successors, (1403), 506 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1403 transitions. [2021-07-13 19:44:25,582 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1403 transitions. Word has length 18 [2021-07-13 19:44:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:25,582 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1403 transitions. [2021-07-13 19:44:25,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1403 transitions. [2021-07-13 19:44:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:25,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:25,582 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:25,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6721,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:25,783 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash 227069809, now seen corresponding path program 339 times [2021-07-13 19:44:25,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:25,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959505490] [2021-07-13 19:44:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:26,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:26,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959505490] [2021-07-13 19:44:26,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959505490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:26,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382103341] [2021-07-13 19:44:26,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:26,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:26,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:26,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:44:26,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:26,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:26,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:26,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:44:26,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:26,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:26,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:26,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:44:26,608 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:26,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:44:26,612 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:26,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:44:26,616 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:26,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:26,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:44:26,620 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:26,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:26,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:26,655 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:415, output treesize:41 [2021-07-13 19:44:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:26,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382103341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:26,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:26,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:44:26,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559743053] [2021-07-13 19:44:26,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:44:26,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:26,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:44:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:26,725 INFO L87 Difference]: Start difference. First operand 507 states and 1403 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,296 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-07-13 19:44:27,783 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-07-13 19:44:28,069 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-07-13 19:44:28,225 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-07-13 19:44:28,416 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-07-13 19:44:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:28,450 INFO L93 Difference]: Finished difference Result 629 states and 1603 transitions. [2021-07-13 19:44:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:44:28,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:28,451 INFO L225 Difference]: With dead ends: 629 [2021-07-13 19:44:28,451 INFO L226 Difference]: Without dead ends: 605 [2021-07-13 19:44:28,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1830.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:44:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-07-13 19:44:28,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 509. [2021-07-13 19:44:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.7559055118110236) internal successors, (1400), 508 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1400 transitions. [2021-07-13 19:44:28,457 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1400 transitions. Word has length 18 [2021-07-13 19:44:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:28,457 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1400 transitions. [2021-07-13 19:44:28,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1400 transitions. [2021-07-13 19:44:28,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:28,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:28,458 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:28,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6747,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:28,658 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:28,658 INFO L82 PathProgramCache]: Analyzing trace with hash -464139095, now seen corresponding path program 340 times [2021-07-13 19:44:28,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:28,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706737463] [2021-07-13 19:44:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:28,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:28,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706737463] [2021-07-13 19:44:28,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706737463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:28,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086123873] [2021-07-13 19:44:28,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:28,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:28,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:28,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:28,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:29,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:29,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:29,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:29,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:44:29,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:29,260 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:29,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:29,268 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:44:29,272 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:44:29,283 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:29,287 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:44:29,291 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:29,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:29,294 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:29,345 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-07-13 19:44:29,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:29,347 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-07-13 19:44:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:29,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086123873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:29,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:29,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:44:29,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703066565] [2021-07-13 19:44:29,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:29,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:29,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:29,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:29,399 INFO L87 Difference]: Start difference. First operand 509 states and 1400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:29,826 INFO L93 Difference]: Finished difference Result 595 states and 1562 transitions. [2021-07-13 19:44:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:44:29,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:29,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:29,828 INFO L225 Difference]: With dead ends: 595 [2021-07-13 19:44:29,828 INFO L226 Difference]: Without dead ends: 582 [2021-07-13 19:44:29,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-07-13 19:44:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 517. [2021-07-13 19:44:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.7655038759689923) internal successors, (1427), 516 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1427 transitions. [2021-07-13 19:44:29,834 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1427 transitions. Word has length 18 [2021-07-13 19:44:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:29,834 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1427 transitions. [2021-07-13 19:44:29,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1427 transitions. [2021-07-13 19:44:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:29,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:29,834 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:30,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6814 [2021-07-13 19:44:30,035 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:30,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:30,035 INFO L82 PathProgramCache]: Analyzing trace with hash -69683091, now seen corresponding path program 341 times [2021-07-13 19:44:30,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:30,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573620925] [2021-07-13 19:44:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:30,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573620925] [2021-07-13 19:44:30,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573620925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774668043] [2021-07-13 19:44:30,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:30,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:44:30,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:30,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:30,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:30,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:30,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:30,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:30,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:30,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:30,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:30,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:30,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:30,513 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-13 19:44:30,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:30,514 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-07-13 19:44:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774668043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:30,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:44:30,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116252680] [2021-07-13 19:44:30,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:44:30,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:44:30,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:30,612 INFO L87 Difference]: Start difference. First operand 517 states and 1427 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:31,129 INFO L93 Difference]: Finished difference Result 626 states and 1610 transitions. [2021-07-13 19:44:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:44:31,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:31,130 INFO L225 Difference]: With dead ends: 626 [2021-07-13 19:44:31,130 INFO L226 Difference]: Without dead ends: 612 [2021-07-13 19:44:31,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:44:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-13 19:44:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 519. [2021-07-13 19:44:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.77027027027027) internal successors, (1435), 518 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1435 transitions. [2021-07-13 19:44:31,136 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1435 transitions. Word has length 18 [2021-07-13 19:44:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:31,136 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1435 transitions. [2021-07-13 19:44:31,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1435 transitions. [2021-07-13 19:44:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:31,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:31,136 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:31,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6893,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:31,337 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1806460823, now seen corresponding path program 342 times [2021-07-13 19:44:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:31,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287141747] [2021-07-13 19:44:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:31,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287141747] [2021-07-13 19:44:31,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287141747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048733174] [2021-07-13 19:44:31,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:31,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:31,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:31,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:31,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:31,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:31,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:31,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:44:31,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:31,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:31,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:31,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:31,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:31,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:31,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:31,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:31,729 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:31,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:31,732 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:31,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:31,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:31,750 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:170, output treesize:40 [2021-07-13 19:44:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:31,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048733174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:31,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:31,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-13 19:44:31,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348491867] [2021-07-13 19:44:31,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:44:31,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:44:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:31,847 INFO L87 Difference]: Start difference. First operand 519 states and 1435 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:32,356 INFO L93 Difference]: Finished difference Result 605 states and 1579 transitions. [2021-07-13 19:44:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:44:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:32,357 INFO L225 Difference]: With dead ends: 605 [2021-07-13 19:44:32,358 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 19:44:32,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:44:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 19:44:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 518. [2021-07-13 19:44:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.7678916827853) internal successors, (1431), 517 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1431 transitions. [2021-07-13 19:44:32,363 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1431 transitions. Word has length 18 [2021-07-13 19:44:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:32,363 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1431 transitions. [2021-07-13 19:44:32,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1431 transitions. [2021-07-13 19:44:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:32,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:32,364 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:32,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6903 [2021-07-13 19:44:32,564 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:32,564 INFO L82 PathProgramCache]: Analyzing trace with hash 468172487, now seen corresponding path program 343 times [2021-07-13 19:44:32,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493490298] [2021-07-13 19:44:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:44:32,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:32,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493490298] [2021-07-13 19:44:32,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493490298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:32,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790188433] [2021-07-13 19:44:32,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:32,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:33,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:44:33,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:33,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:33,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:33,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:33,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:33,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:33,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:33,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:33,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:33,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:33,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:33,132 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-07-13 19:44:33,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:33,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:33,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:33,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:33,165 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:33,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:33,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:33,192 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:44:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:33,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790188433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:33,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:33,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:44:33,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554661234] [2021-07-13 19:44:33,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:33,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:33,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:33,290 INFO L87 Difference]: Start difference. First operand 518 states and 1431 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:33,827 INFO L93 Difference]: Finished difference Result 573 states and 1523 transitions. [2021-07-13 19:44:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:33,828 INFO L225 Difference]: With dead ends: 573 [2021-07-13 19:44:33,828 INFO L226 Difference]: Without dead ends: 566 [2021-07-13 19:44:33,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 731.2ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:44:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-13 19:44:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 518. [2021-07-13 19:44:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.765957446808511) internal successors, (1430), 517 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1430 transitions. [2021-07-13 19:44:33,833 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1430 transitions. Word has length 18 [2021-07-13 19:44:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:33,833 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1430 transitions. [2021-07-13 19:44:33,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1430 transitions. [2021-07-13 19:44:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:33,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:33,834 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:34,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6913,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:34,034 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:34,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1268605245, now seen corresponding path program 344 times [2021-07-13 19:44:34,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:34,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768708225] [2021-07-13 19:44:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:44:34,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:34,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768708225] [2021-07-13 19:44:34,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768708225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:34,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430005265] [2021-07-13 19:44:34,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:34,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:34,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:34,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:34,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:34,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:34,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:34,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:34,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:34,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:34,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:34,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:34,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:34,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:34,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:34,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:34,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:34,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:34,558 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:44:34,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:34,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:34,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:34,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:34,592 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:34,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:34,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:34,619 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:44:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:34,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430005265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:34,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:34,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:44:34,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051461809] [2021-07-13 19:44:34,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:34,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:34,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:34,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:34,714 INFO L87 Difference]: Start difference. First operand 518 states and 1430 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:35,261 INFO L93 Difference]: Finished difference Result 575 states and 1522 transitions. [2021-07-13 19:44:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:35,262 INFO L225 Difference]: With dead ends: 575 [2021-07-13 19:44:35,263 INFO L226 Difference]: Without dead ends: 568 [2021-07-13 19:44:35,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 683.1ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:44:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-13 19:44:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 518. [2021-07-13 19:44:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.765957446808511) internal successors, (1430), 517 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1430 transitions. [2021-07-13 19:44:35,268 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1430 transitions. Word has length 18 [2021-07-13 19:44:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:35,268 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1430 transitions. [2021-07-13 19:44:35,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1430 transitions. [2021-07-13 19:44:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:35,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:35,269 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:35,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6938 [2021-07-13 19:44:35,469 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1710204747, now seen corresponding path program 345 times [2021-07-13 19:44:35,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:35,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618831223] [2021-07-13 19:44:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:44:35,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:35,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618831223] [2021-07-13 19:44:35,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618831223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:35,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894099090] [2021-07-13 19:44:35,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:35,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:35,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:35,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:35,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:36,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:44:36,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:36,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:36,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:36,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:44:36,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:36,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:36,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:36,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:44:36,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:44:36,158 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:44:36,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:44:36,167 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:36,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:36,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:36,170 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:36,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:36,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:36,206 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:415, output treesize:41 [2021-07-13 19:44:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:36,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894099090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:36,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:36,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:44:36,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904960967] [2021-07-13 19:44:36,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:44:36,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:44:36,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:36,275 INFO L87 Difference]: Start difference. First operand 518 states and 1430 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,814 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-07-13 19:44:37,258 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-13 19:44:37,391 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-07-13 19:44:37,630 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-13 19:44:37,773 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-13 19:44:37,915 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-07-13 19:44:38,170 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-13 19:44:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:38,203 INFO L93 Difference]: Finished difference Result 653 states and 1659 transitions. [2021-07-13 19:44:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:44:38,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:38,204 INFO L225 Difference]: With dead ends: 653 [2021-07-13 19:44:38,204 INFO L226 Difference]: Without dead ends: 611 [2021-07-13 19:44:38,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1957.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:44:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-07-13 19:44:38,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 518. [2021-07-13 19:44:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.756286266924565) internal successors, (1425), 517 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1425 transitions. [2021-07-13 19:44:38,210 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1425 transitions. Word has length 18 [2021-07-13 19:44:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:38,210 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1425 transitions. [2021-07-13 19:44:38,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1425 transitions. [2021-07-13 19:44:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:38,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:38,210 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:38,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6963,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:38,411 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash -38173779, now seen corresponding path program 346 times [2021-07-13 19:44:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:38,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924356811] [2021-07-13 19:44:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:38,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:38,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924356811] [2021-07-13 19:44:38,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924356811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:38,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154942840] [2021-07-13 19:44:38,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:38,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:38,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:38,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:38,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:38,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:38,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:38,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:38,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:38,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:38,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:38,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:44:38,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:38,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:38,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:38,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:38,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:38,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:38,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:38,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:39,011 INFO L628 ElimStorePlain]: treesize reduction 243, result has 24.1 percent of original size [2021-07-13 19:44:39,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:39,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:39,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:39,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:39,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:39,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:39,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:39,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:39,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:39,074 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:44:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:39,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154942840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:39,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:39,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:44:39,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878432909] [2021-07-13 19:44:39,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:44:39,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:39,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:44:39,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:39,175 INFO L87 Difference]: Start difference. First operand 518 states and 1425 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:39,752 INFO L93 Difference]: Finished difference Result 572 states and 1507 transitions. [2021-07-13 19:44:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:44:39,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:39,753 INFO L225 Difference]: With dead ends: 572 [2021-07-13 19:44:39,753 INFO L226 Difference]: Without dead ends: 562 [2021-07-13 19:44:39,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:44:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-13 19:44:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 518. [2021-07-13 19:44:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.756286266924565) internal successors, (1425), 517 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1425 transitions. [2021-07-13 19:44:39,758 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1425 transitions. Word has length 18 [2021-07-13 19:44:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:39,758 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1425 transitions. [2021-07-13 19:44:39,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1425 transitions. [2021-07-13 19:44:39,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:39,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:39,759 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:39,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7031,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:39,959 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1774951511, now seen corresponding path program 347 times [2021-07-13 19:44:39,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:39,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165431877] [2021-07-13 19:44:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:40,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:40,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165431877] [2021-07-13 19:44:40,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165431877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:40,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221832340] [2021-07-13 19:44:40,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:40,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:44:40,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:40,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:40,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:40,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:40,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:40,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:40,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:40,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:40,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:44:40,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:40,396 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:40,397 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:40,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:40,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:40,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:40,402 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:40,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:40,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:40,420 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:170, output treesize:40 [2021-07-13 19:44:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:40,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221832340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:40,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:40,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38700565] [2021-07-13 19:44:40,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:40,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:40,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:40,521 INFO L87 Difference]: Start difference. First operand 518 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:41,018 INFO L93 Difference]: Finished difference Result 571 states and 1506 transitions. [2021-07-13 19:44:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:44:41,018 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:41,019 INFO L225 Difference]: With dead ends: 571 [2021-07-13 19:44:41,019 INFO L226 Difference]: Without dead ends: 564 [2021-07-13 19:44:41,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 623.4ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:44:41,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-07-13 19:44:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 521. [2021-07-13 19:44:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.7576923076923077) internal successors, (1434), 520 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1434 transitions. [2021-07-13 19:44:41,024 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1434 transitions. Word has length 18 [2021-07-13 19:44:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:41,025 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1434 transitions. [2021-07-13 19:44:41,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1434 transitions. [2021-07-13 19:44:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:41,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:41,025 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:41,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7056 [2021-07-13 19:44:41,226 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:41,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1203858481, now seen corresponding path program 348 times [2021-07-13 19:44:41,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:41,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667481649] [2021-07-13 19:44:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:41,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:41,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667481649] [2021-07-13 19:44:41,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667481649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:41,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134935202] [2021-07-13 19:44:41,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:41,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:44:41,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:41,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:41,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:44:41,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:41,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:41,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:44:41,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:44:41,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:41,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:44:41,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:44:41,965 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:41,971 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:44:41,977 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:44:41,983 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:41,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:41,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:41,988 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:42,059 INFO L628 ElimStorePlain]: treesize reduction 27, result has 74.0 percent of original size [2021-07-13 19:44:42,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:42,061 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:566, output treesize:41 [2021-07-13 19:44:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:42,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134935202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:42,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:42,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-13 19:44:42,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76268752] [2021-07-13 19:44:42,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:44:42,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:42,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:44:42,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:42,132 INFO L87 Difference]: Start difference. First operand 521 states and 1434 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,055 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-07-13 19:44:43,428 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-07-13 19:44:43,578 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-13 19:44:43,844 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-07-13 19:44:44,000 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-07-13 19:44:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:44,053 INFO L93 Difference]: Finished difference Result 648 states and 1649 transitions. [2021-07-13 19:44:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:44:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:44,054 INFO L225 Difference]: With dead ends: 648 [2021-07-13 19:44:44,054 INFO L226 Difference]: Without dead ends: 635 [2021-07-13 19:44:44,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1895.1ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:44:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-07-13 19:44:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 521. [2021-07-13 19:44:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.753846153846154) internal successors, (1432), 520 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1432 transitions. [2021-07-13 19:44:44,060 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1432 transitions. Word has length 18 [2021-07-13 19:44:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:44,060 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1432 transitions. [2021-07-13 19:44:44,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1432 transitions. [2021-07-13 19:44:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:44,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:44,061 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:44,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7066 [2021-07-13 19:44:44,261 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash -942312279, now seen corresponding path program 349 times [2021-07-13 19:44:44,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:44,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705630183] [2021-07-13 19:44:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:44,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:44,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705630183] [2021-07-13 19:44:44,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705630183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:44,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616227323] [2021-07-13 19:44:44,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:44,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:44,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:44,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:44,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:44,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:44,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:44,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:44,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:44,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:44,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:44,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:44,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:44,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:44,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,894 INFO L628 ElimStorePlain]: treesize reduction 265, result has 22.7 percent of original size [2021-07-13 19:44:44,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:44,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:44,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:44,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:44,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:44,927 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:44,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:44,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:44,952 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:44:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616227323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:45,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:44:45,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398610404] [2021-07-13 19:44:45,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:44:45,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:44:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:45,025 INFO L87 Difference]: Start difference. First operand 521 states and 1432 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:45,361 INFO L93 Difference]: Finished difference Result 560 states and 1489 transitions. [2021-07-13 19:44:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:44:45,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:45,362 INFO L225 Difference]: With dead ends: 560 [2021-07-13 19:44:45,362 INFO L226 Difference]: Without dead ends: 553 [2021-07-13 19:44:45,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-13 19:44:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 521. [2021-07-13 19:44:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.753846153846154) internal successors, (1432), 520 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1432 transitions. [2021-07-13 19:44:45,368 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1432 transitions. Word has length 18 [2021-07-13 19:44:45,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:45,368 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1432 transitions. [2021-07-13 19:44:45,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,368 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1432 transitions. [2021-07-13 19:44:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:45,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:45,368 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:45,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7097,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:45,569 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:45,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1731596273, now seen corresponding path program 350 times [2021-07-13 19:44:45,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:45,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738323152] [2021-07-13 19:44:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738323152] [2021-07-13 19:44:45,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738323152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168608030] [2021-07-13 19:44:45,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:45,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:46,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:46,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,119 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 18 treesize of output 1 [2021-07-13 19:44:46,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:46,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:46,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:46,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:44:46,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:44:46,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:46,144 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:44:46,148 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:46,152 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:46,171 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:46,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:46,175 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:46,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:46,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:46,204 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-07-13 19:44:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168608030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:46,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:46,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294257982] [2021-07-13 19:44:46,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:46,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:46,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:46,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:46,268 INFO L87 Difference]: Start difference. First operand 521 states and 1432 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:46,785 INFO L93 Difference]: Finished difference Result 625 states and 1621 transitions. [2021-07-13 19:44:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:44:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:46,786 INFO L225 Difference]: With dead ends: 625 [2021-07-13 19:44:46,786 INFO L226 Difference]: Without dead ends: 605 [2021-07-13 19:44:46,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:44:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-07-13 19:44:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 527. [2021-07-13 19:44:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.76425855513308) internal successors, (1454), 526 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1454 transitions. [2021-07-13 19:44:46,792 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1454 transitions. Word has length 18 [2021-07-13 19:44:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:46,792 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1454 transitions. [2021-07-13 19:44:46,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1454 transitions. [2021-07-13 19:44:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:46,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:46,793 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:46,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7120 [2021-07-13 19:44:46,993 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1337140269, now seen corresponding path program 351 times [2021-07-13 19:44:46,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:46,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291506400] [2021-07-13 19:44:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:47,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291506400] [2021-07-13 19:44:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291506400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648957903] [2021-07-13 19:44:47,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:47,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:44:47,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:47,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:47,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:44:47,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:47,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-07-13 19:44:47,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:47,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:47,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:47,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:44:47,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:47,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:47,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:47,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:44:47,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:47,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:44:47,647 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:47,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-07-13 19:44:47,651 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:47,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:47,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:47,654 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:47,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:47,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:47,682 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:352, output treesize:40 [2021-07-13 19:44:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:47,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648957903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:47,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:47,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:47,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072107451] [2021-07-13 19:44:47,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:47,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:47,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:47,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:47,782 INFO L87 Difference]: Start difference. First operand 527 states and 1454 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,465 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-13 19:44:49,145 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-07-13 19:44:49,417 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-07-13 19:44:49,676 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 19:44:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:49,712 INFO L93 Difference]: Finished difference Result 820 states and 2015 transitions. [2021-07-13 19:44:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:44:49,713 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:49,714 INFO L225 Difference]: With dead ends: 820 [2021-07-13 19:44:49,714 INFO L226 Difference]: Without dead ends: 742 [2021-07-13 19:44:49,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1955.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:44:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-07-13 19:44:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 546. [2021-07-13 19:44:49,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.7504587155963303) internal successors, (1499), 545 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1499 transitions. [2021-07-13 19:44:49,723 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1499 transitions. Word has length 18 [2021-07-13 19:44:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:49,723 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1499 transitions. [2021-07-13 19:44:49,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1499 transitions. [2021-07-13 19:44:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:49,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:49,724 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:49,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7187,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:49,939 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:49,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1221049295, now seen corresponding path program 352 times [2021-07-13 19:44:49,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:49,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515177698] [2021-07-13 19:44:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:50,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515177698] [2021-07-13 19:44:50,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515177698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741305538] [2021-07-13 19:44:50,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:50,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:50,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:50,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:44:50,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:50,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:44:50,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:50,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:44:50,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:50,544 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:50,548 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:44:50,552 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:50,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:50,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:50,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:50,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:50,582 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:322, output treesize:40 [2021-07-13 19:44:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741305538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:50,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:50,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228307672] [2021-07-13 19:44:50,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:50,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:50,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:50,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:50,679 INFO L87 Difference]: Start difference. First operand 546 states and 1499 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:51,049 INFO L93 Difference]: Finished difference Result 619 states and 1617 transitions. [2021-07-13 19:44:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:44:51,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:51,050 INFO L225 Difference]: With dead ends: 619 [2021-07-13 19:44:51,050 INFO L226 Difference]: Without dead ends: 612 [2021-07-13 19:44:51,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 564.3ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:51,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-13 19:44:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 548. [2021-07-13 19:44:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.7513711151736744) internal successors, (1505), 547 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1505 transitions. [2021-07-13 19:44:51,056 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1505 transitions. Word has length 18 [2021-07-13 19:44:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:51,056 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1505 transitions. [2021-07-13 19:44:51,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,056 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1505 transitions. [2021-07-13 19:44:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:51,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:51,056 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:51,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7239,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:51,257 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash -799284691, now seen corresponding path program 353 times [2021-07-13 19:44:51,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:51,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297942067] [2021-07-13 19:44:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:51,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297942067] [2021-07-13 19:44:51,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297942067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26987136] [2021-07-13 19:44:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:51,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:44:51,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:51,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:51,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:51,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:51,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:51,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:51,648 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:51,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:51,654 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:51,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:51,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:51,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:51,674 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:180, output treesize:40 [2021-07-13 19:44:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26987136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:51,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:51,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983282090] [2021-07-13 19:44:51,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:51,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:51,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:51,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:51,776 INFO L87 Difference]: Start difference. First operand 548 states and 1505 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:52,344 INFO L93 Difference]: Finished difference Result 597 states and 1577 transitions. [2021-07-13 19:44:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:44:52,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:52,345 INFO L225 Difference]: With dead ends: 597 [2021-07-13 19:44:52,345 INFO L226 Difference]: Without dead ends: 590 [2021-07-13 19:44:52,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 692.1ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:44:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-07-13 19:44:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 548. [2021-07-13 19:44:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.7513711151736744) internal successors, (1505), 547 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1505 transitions. [2021-07-13 19:44:52,351 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1505 transitions. Word has length 18 [2021-07-13 19:44:52,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:52,351 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1505 transitions. [2021-07-13 19:44:52,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,351 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1505 transitions. [2021-07-13 19:44:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:52,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:52,352 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:52,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7290,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:52,552 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:52,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1758904873, now seen corresponding path program 354 times [2021-07-13 19:44:52,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:52,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850751049] [2021-07-13 19:44:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:52,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:52,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850751049] [2021-07-13 19:44:52,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850751049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:52,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452738481] [2021-07-13 19:44:52,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:52,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:44:52,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:52,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:52,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:53,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:44:53,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:53,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:44:53,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:53,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:44:53,161 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:53,165 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-07-13 19:44:53,170 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:53,173 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:53,176 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:53,180 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:44:53,184 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-07-13 19:44:53,188 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:44:53,192 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:44:53,196 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:53,199 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:53,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:44:53,202 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:53,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:53,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:53,230 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:40 [2021-07-13 19:44:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:53,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452738481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:53,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:53,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:53,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58100574] [2021-07-13 19:44:53,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:53,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:53,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:53,332 INFO L87 Difference]: Start difference. First operand 548 states and 1505 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,148 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-07-13 19:44:54,651 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-07-13 19:44:55,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:55,004 INFO L93 Difference]: Finished difference Result 706 states and 1767 transitions. [2021-07-13 19:44:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:44:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:55,005 INFO L225 Difference]: With dead ends: 706 [2021-07-13 19:44:55,005 INFO L226 Difference]: Without dead ends: 669 [2021-07-13 19:44:55,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1650.0ms TimeCoverageRelationStatistics Valid=218, Invalid=1342, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:44:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-07-13 19:44:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 541. [2021-07-13 19:44:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.748148148148148) internal successors, (1484), 540 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1484 transitions. [2021-07-13 19:44:55,012 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1484 transitions. Word has length 18 [2021-07-13 19:44:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:55,012 INFO L482 AbstractCegarLoop]: Abstraction has 541 states and 1484 transitions. [2021-07-13 19:44:55,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1484 transitions. [2021-07-13 19:44:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:55,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:55,013 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:55,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7298 [2021-07-13 19:44:55,213 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash 442747569, now seen corresponding path program 355 times [2021-07-13 19:44:55,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:55,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770866087] [2021-07-13 19:44:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:55,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770866087] [2021-07-13 19:44:55,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770866087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928658919] [2021-07-13 19:44:55,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:55,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:55,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:55,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:44:55,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:55,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,825 INFO L628 ElimStorePlain]: treesize reduction 164, result has 32.2 percent of original size [2021-07-13 19:44:55,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:55,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:55,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:55,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:55,857 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:55,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:55,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:55,882 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:44:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928658919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:55,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:55,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194405080] [2021-07-13 19:44:55,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:55,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:55,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:55,947 INFO L87 Difference]: Start difference. First operand 541 states and 1484 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:56,527 INFO L93 Difference]: Finished difference Result 579 states and 1541 transitions. [2021-07-13 19:44:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:44:56,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:56,528 INFO L225 Difference]: With dead ends: 579 [2021-07-13 19:44:56,528 INFO L226 Difference]: Without dead ends: 572 [2021-07-13 19:44:56,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 699.4ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:44:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-07-13 19:44:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 540. [2021-07-13 19:44:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.749536178107607) internal successors, (1482), 539 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1482 transitions. [2021-07-13 19:44:56,533 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1482 transitions. Word has length 18 [2021-07-13 19:44:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:56,534 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1482 transitions. [2021-07-13 19:44:56,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1482 transitions. [2021-07-13 19:44:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:56,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:56,534 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:56,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7370,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,735 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:56,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1305630957, now seen corresponding path program 356 times [2021-07-13 19:44:56,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:56,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654842692] [2021-07-13 19:44:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:56,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:56,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654842692] [2021-07-13 19:44:56,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654842692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:56,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334345565] [2021-07-13 19:44:56,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:56,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:57,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:57,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:44:57,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:44:57,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:44:57,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,329 INFO L628 ElimStorePlain]: treesize reduction 243, result has 24.1 percent of original size [2021-07-13 19:44:57,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:57,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:57,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:57,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:44:57,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:57,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:57,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:57,399 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:44:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:57,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334345565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:57,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:57,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:44:57,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989317527] [2021-07-13 19:44:57,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:44:57,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:57,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:44:57,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:57,499 INFO L87 Difference]: Start difference. First operand 540 states and 1482 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:57,914 INFO L93 Difference]: Finished difference Result 577 states and 1541 transitions. [2021-07-13 19:44:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:44:57,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:57,915 INFO L225 Difference]: With dead ends: 577 [2021-07-13 19:44:57,915 INFO L226 Difference]: Without dead ends: 567 [2021-07-13 19:44:57,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 585.0ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-13 19:44:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 542. [2021-07-13 19:44:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.7504621072088726) internal successors, (1488), 541 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1488 transitions. [2021-07-13 19:44:57,920 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1488 transitions. Word has length 18 [2021-07-13 19:44:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:57,920 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1488 transitions. [2021-07-13 19:44:57,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1488 transitions. [2021-07-13 19:44:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:57,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:57,921 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:58,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7395 [2021-07-13 19:44:58,122 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:58,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:58,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1252558607, now seen corresponding path program 357 times [2021-07-13 19:44:58,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:58,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538437520] [2021-07-13 19:44:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:58,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538437520] [2021-07-13 19:44:58,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538437520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868450902] [2021-07-13 19:44:58,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:58,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:58,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:58,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:44:58,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:58,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-07-13 19:44:58,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:58,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:44:58,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:58,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:44:58,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:58,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-07-13 19:44:58,706 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:58,792 INFO L628 ElimStorePlain]: treesize reduction 285, result has 22.6 percent of original size [2021-07-13 19:44:58,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-07-13 19:44:58,796 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:58,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:44:58,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-07-13 19:44:58,828 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:58,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:44:58,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:58,855 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:494, output treesize:40 [2021-07-13 19:44:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868450902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:58,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:44:58,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280270217] [2021-07-13 19:44:58,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:44:58,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:58,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:44:58,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:58,956 INFO L87 Difference]: Start difference. First operand 542 states and 1488 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:59,646 INFO L93 Difference]: Finished difference Result 598 states and 1577 transitions. [2021-07-13 19:44:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:44:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:44:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:59,647 INFO L225 Difference]: With dead ends: 598 [2021-07-13 19:44:59,647 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 19:44:59,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 837.2ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:44:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 19:44:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 546. [2021-07-13 19:44:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.7541284403669724) internal successors, (1501), 545 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1501 transitions. [2021-07-13 19:44:59,652 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1501 transitions. Word has length 18 [2021-07-13 19:44:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:59,652 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1501 transitions. [2021-07-13 19:44:59,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1501 transitions. [2021-07-13 19:44:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:44:59,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:59,653 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:59,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7419,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:59,853 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:59,854 INFO L82 PathProgramCache]: Analyzing trace with hash -63598697, now seen corresponding path program 358 times [2021-07-13 19:44:59,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:59,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612529722] [2021-07-13 19:44:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:00,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612529722] [2021-07-13 19:45:00,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612529722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311178227] [2021-07-13 19:45:00,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:00,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:00,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:00,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:00,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:00,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:00,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:00,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:00,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:00,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:00,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:00,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:00,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,481 INFO L628 ElimStorePlain]: treesize reduction 265, result has 22.7 percent of original size [2021-07-13 19:45:00,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:00,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:00,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:00,514 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:00,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:00,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:00,540 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:45:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311178227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:00,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:00,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590806993] [2021-07-13 19:45:00,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:00,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:00,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:00,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:00,605 INFO L87 Difference]: Start difference. First operand 546 states and 1501 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:00,982 INFO L93 Difference]: Finished difference Result 570 states and 1538 transitions. [2021-07-13 19:45:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:00,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:00,983 INFO L225 Difference]: With dead ends: 570 [2021-07-13 19:45:00,983 INFO L226 Difference]: Without dead ends: 563 [2021-07-13 19:45:00,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-13 19:45:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 546. [2021-07-13 19:45:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.7541284403669724) internal successors, (1501), 545 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1501 transitions. [2021-07-13 19:45:00,988 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1501 transitions. Word has length 18 [2021-07-13 19:45:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:00,988 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1501 transitions. [2021-07-13 19:45:00,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1501 transitions. [2021-07-13 19:45:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:00,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:00,989 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:01,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7442 [2021-07-13 19:45:01,189 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:01,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:01,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2085197839, now seen corresponding path program 359 times [2021-07-13 19:45:01,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:01,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045936220] [2021-07-13 19:45:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:01,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:01,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045936220] [2021-07-13 19:45:01,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045936220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:01,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183562177] [2021-07-13 19:45:01,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:01,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:01,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:01,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:01,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:01,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:01,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:01,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:01,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:01,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:01,795 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:45:01,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:01,796 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-07-13 19:45:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:01,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183562177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:01,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:01,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:45:01,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044923499] [2021-07-13 19:45:01,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:45:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:01,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:45:01,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:01,864 INFO L87 Difference]: Start difference. First operand 546 states and 1501 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:02,201 INFO L93 Difference]: Finished difference Result 568 states and 1535 transitions. [2021-07-13 19:45:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:02,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:02,202 INFO L225 Difference]: With dead ends: 568 [2021-07-13 19:45:02,202 INFO L226 Difference]: Without dead ends: 561 [2021-07-13 19:45:02,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 611.7ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-07-13 19:45:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 546. [2021-07-13 19:45:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.7541284403669724) internal successors, (1501), 545 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1501 transitions. [2021-07-13 19:45:02,208 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1501 transitions. Word has length 18 [2021-07-13 19:45:02,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:02,208 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1501 transitions. [2021-07-13 19:45:02,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1501 transitions. [2021-07-13 19:45:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:02,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:02,208 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:02,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7465 [2021-07-13 19:45:02,409 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:02,409 INFO L82 PathProgramCache]: Analyzing trace with hash 177503981, now seen corresponding path program 360 times [2021-07-13 19:45:02,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:02,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669991605] [2021-07-13 19:45:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:02,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:02,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669991605] [2021-07-13 19:45:02,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669991605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:02,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845009356] [2021-07-13 19:45:02,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:02,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:45:02,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:02,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:02,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:02,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:02,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:02,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:02,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:02,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:02,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:02,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:02,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:45:02,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:03,039 INFO L628 ElimStorePlain]: treesize reduction 239, result has 24.4 percent of original size [2021-07-13 19:45:03,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:03,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:03,043 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:03,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:03,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:03,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:03,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:03,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:03,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:03,101 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:448, output treesize:40 [2021-07-13 19:45:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:03,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845009356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:03,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:03,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:03,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032166461] [2021-07-13 19:45:03,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:03,204 INFO L87 Difference]: Start difference. First operand 546 states and 1501 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:03,676 INFO L93 Difference]: Finished difference Result 586 states and 1566 transitions. [2021-07-13 19:45:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:03,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:03,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:03,677 INFO L225 Difference]: With dead ends: 586 [2021-07-13 19:45:03,677 INFO L226 Difference]: Without dead ends: 576 [2021-07-13 19:45:03,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-13 19:45:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 549. [2021-07-13 19:45:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-07-13 19:45:03,683 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-07-13 19:45:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:03,683 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-07-13 19:45:03,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-07-13 19:45:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:03,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:03,684 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:03,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7475 [2021-07-13 19:45:03,884 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:03,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1559273751, now seen corresponding path program 361 times [2021-07-13 19:45:03,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:03,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795309291] [2021-07-13 19:45:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:04,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:04,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795309291] [2021-07-13 19:45:04,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795309291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:04,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308896121] [2021-07-13 19:45:04,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:04,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:04,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:04,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:04,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:45:04,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:04,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,505 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-07-13 19:45:04,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:04,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:04,509 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:04,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:04,540 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:04,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:04,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:04,575 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:45:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:04,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308896121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:04,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:04,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:04,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844807764] [2021-07-13 19:45:04,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:04,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:04,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:04,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:04,679 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:05,090 INFO L93 Difference]: Finished difference Result 585 states and 1565 transitions. [2021-07-13 19:45:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:05,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:05,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:05,091 INFO L225 Difference]: With dead ends: 585 [2021-07-13 19:45:05,091 INFO L226 Difference]: Without dead ends: 578 [2021-07-13 19:45:05,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 559.2ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:05,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-13 19:45:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 549. [2021-07-13 19:45:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-07-13 19:45:05,096 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-07-13 19:45:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:05,096 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-07-13 19:45:05,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-07-13 19:45:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:05,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:05,097 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:05,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7501 [2021-07-13 19:45:05,297 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:05,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:05,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1419536241, now seen corresponding path program 362 times [2021-07-13 19:45:05,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:05,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151099406] [2021-07-13 19:45:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:05,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151099406] [2021-07-13 19:45:05,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151099406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3309413] [2021-07-13 19:45:05,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:05,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:05,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:05,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:05,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:05,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:05,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:45:05,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:05,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:05,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:05,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:05,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:05,848 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:41 [2021-07-13 19:45:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3309413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:05,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:05,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190014337] [2021-07-13 19:45:05,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:05,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:05,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:05,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:05,914 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:06,222 INFO L93 Difference]: Finished difference Result 575 states and 1550 transitions. [2021-07-13 19:45:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:06,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:06,223 INFO L225 Difference]: With dead ends: 575 [2021-07-13 19:45:06,223 INFO L226 Difference]: Without dead ends: 568 [2021-07-13 19:45:06,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-13 19:45:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 549. [2021-07-13 19:45:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-07-13 19:45:06,229 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-07-13 19:45:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:06,229 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-07-13 19:45:06,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-07-13 19:45:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:06,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:06,230 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:06,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7524,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:06,430 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash -726634519, now seen corresponding path program 363 times [2021-07-13 19:45:06,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:06,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650340658] [2021-07-13 19:45:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:06,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:06,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650340658] [2021-07-13 19:45:06,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650340658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:06,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971611029] [2021-07-13 19:45:06,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:06,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:06,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:06,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:07,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:07,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:07,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:07,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:07,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,113 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-07-13 19:45:07,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:07,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:07,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:07,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:07,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:07,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:07,171 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:45:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:07,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971611029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:07,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:07,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:07,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628056535] [2021-07-13 19:45:07,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:07,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:07,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:07,239 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:07,614 INFO L93 Difference]: Finished difference Result 575 states and 1550 transitions. [2021-07-13 19:45:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:07,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:07,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:07,615 INFO L225 Difference]: With dead ends: 575 [2021-07-13 19:45:07,615 INFO L226 Difference]: Without dead ends: 568 [2021-07-13 19:45:07,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-13 19:45:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 549. [2021-07-13 19:45:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-07-13 19:45:07,620 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-07-13 19:45:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:07,620 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-07-13 19:45:07,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-07-13 19:45:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:07,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:07,621 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:07,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7538 [2021-07-13 19:45:07,822 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1461548657, now seen corresponding path program 364 times [2021-07-13 19:45:07,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:07,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941470247] [2021-07-13 19:45:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:08,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:08,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941470247] [2021-07-13 19:45:08,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941470247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:08,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149675894] [2021-07-13 19:45:08,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:08,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:08,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:08,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:08,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:08,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:45:08,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:08,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:08,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:08,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:08,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:08,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:08,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,526 INFO L628 ElimStorePlain]: treesize reduction 232, result has 23.9 percent of original size [2021-07-13 19:45:08,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:08,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:08,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:08,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:08,558 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:08,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:08,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:08,583 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:45:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:08,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149675894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:08,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:08,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:08,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178893889] [2021-07-13 19:45:08,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:08,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:08,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:08,651 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:08,947 INFO L93 Difference]: Finished difference Result 573 states and 1547 transitions. [2021-07-13 19:45:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:08,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:08,948 INFO L225 Difference]: With dead ends: 573 [2021-07-13 19:45:08,948 INFO L226 Difference]: Without dead ends: 566 [2021-07-13 19:45:08,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:08,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-13 19:45:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 549. [2021-07-13 19:45:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-07-13 19:45:08,954 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-07-13 19:45:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:08,954 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-07-13 19:45:08,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-07-13 19:45:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:08,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:08,955 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:09,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7563 [2021-07-13 19:45:09,155 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:09,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:09,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1502592933, now seen corresponding path program 365 times [2021-07-13 19:45:09,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:09,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269635543] [2021-07-13 19:45:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:09,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:09,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269635543] [2021-07-13 19:45:09,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269635543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:09,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060549569] [2021-07-13 19:45:09,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:09,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:45:09,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:09,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:09,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:09,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:09,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:09,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:09,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:09,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:09,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:09,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:09,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:09,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:09,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:09,602 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:41 [2021-07-13 19:45:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:09,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060549569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:09,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:09,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:45:09,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437648323] [2021-07-13 19:45:09,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:45:09,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:45:09,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:09,669 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:10,211 INFO L93 Difference]: Finished difference Result 666 states and 1722 transitions. [2021-07-13 19:45:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:45:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:10,213 INFO L225 Difference]: With dead ends: 666 [2021-07-13 19:45:10,213 INFO L226 Difference]: Without dead ends: 646 [2021-07-13 19:45:10,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:45:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-07-13 19:45:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 555. [2021-07-13 19:45:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.765342960288809) internal successors, (1532), 554 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1532 transitions. [2021-07-13 19:45:10,218 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1532 transitions. Word has length 18 [2021-07-13 19:45:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:10,219 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1532 transitions. [2021-07-13 19:45:10,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1532 transitions. [2021-07-13 19:45:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:10,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:10,219 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:10,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7587 [2021-07-13 19:45:10,420 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1897048937, now seen corresponding path program 366 times [2021-07-13 19:45:10,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:10,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422597373] [2021-07-13 19:45:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:10,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:10,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422597373] [2021-07-13 19:45:10,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422597373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:10,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007266450] [2021-07-13 19:45:10,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:10,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:45:10,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:10,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:10,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:10,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:10,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:45:10,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:10,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:10,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:10,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:10,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:10,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:10,835 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:10,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:10,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:10,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:10,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:10,856 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-13 19:45:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:10,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007266450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:10,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:10,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:45:10,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595186928] [2021-07-13 19:45:10,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:45:10,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:10,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:45:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:10,959 INFO L87 Difference]: Start difference. First operand 555 states and 1532 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:11,455 INFO L93 Difference]: Finished difference Result 672 states and 1739 transitions. [2021-07-13 19:45:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:45:11,455 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:11,456 INFO L225 Difference]: With dead ends: 672 [2021-07-13 19:45:11,456 INFO L226 Difference]: Without dead ends: 665 [2021-07-13 19:45:11,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 564.7ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:45:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-07-13 19:45:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 557. [2021-07-13 19:45:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.7697841726618706) internal successors, (1540), 556 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1540 transitions. [2021-07-13 19:45:11,462 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1540 transitions. Word has length 18 [2021-07-13 19:45:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:11,462 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1540 transitions. [2021-07-13 19:45:11,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1540 transitions. [2021-07-13 19:45:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:11,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:11,463 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:11,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7598,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:11,663 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash 160271205, now seen corresponding path program 367 times [2021-07-13 19:45:11,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:11,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52569474] [2021-07-13 19:45:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:11,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52569474] [2021-07-13 19:45:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52569474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106594628] [2021-07-13 19:45:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:11,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:11,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:12,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:12,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:45:12,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:12,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:12,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:12,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:12,260 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:12,265 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:12,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-07-13 19:45:12,272 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:12,276 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:12,279 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 19:45:12,283 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:12,287 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:12,290 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:12,294 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:12,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:12,297 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:12,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:12,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:12,324 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:40 [2021-07-13 19:45:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:12,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106594628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:12,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:12,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:45:12,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176010434] [2021-07-13 19:45:12,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:45:12,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:12,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:45:12,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:12,425 INFO L87 Difference]: Start difference. First operand 557 states and 1540 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:13,075 INFO L93 Difference]: Finished difference Result 670 states and 1733 transitions. [2021-07-13 19:45:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:45:13,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:13,076 INFO L225 Difference]: With dead ends: 670 [2021-07-13 19:45:13,076 INFO L226 Difference]: Without dead ends: 656 [2021-07-13 19:45:13,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 669.2ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:45:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-07-13 19:45:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 556. [2021-07-13 19:45:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.7675675675675677) internal successors, (1536), 555 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1536 transitions. [2021-07-13 19:45:13,082 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1536 transitions. Word has length 18 [2021-07-13 19:45:13,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:13,082 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1536 transitions. [2021-07-13 19:45:13,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1536 transitions. [2021-07-13 19:45:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:13,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:13,083 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:13,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7609 [2021-07-13 19:45:13,284 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1860062781, now seen corresponding path program 368 times [2021-07-13 19:45:13,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:13,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060598870] [2021-07-13 19:45:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:13,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060598870] [2021-07-13 19:45:13,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060598870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:13,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125778047] [2021-07-13 19:45:13,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:13,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:13,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:13,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:13,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:13,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:13,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:13,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:13,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:13,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:13,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:13,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:13,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:13,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:13,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:13,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:13,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,816 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:45:13,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:13,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:13,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:13,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:13,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:13,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:13,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:13,877 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:45:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:13,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125778047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:13,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:13,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:13,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633104885] [2021-07-13 19:45:13,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:13,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:13,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:13,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:13,976 INFO L87 Difference]: Start difference. First operand 556 states and 1536 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:14,531 INFO L93 Difference]: Finished difference Result 629 states and 1660 transitions. [2021-07-13 19:45:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:45:14,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:14,532 INFO L225 Difference]: With dead ends: 629 [2021-07-13 19:45:14,532 INFO L226 Difference]: Without dead ends: 622 [2021-07-13 19:45:14,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 655.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:45:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-07-13 19:45:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 556. [2021-07-13 19:45:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.765765765765766) internal successors, (1535), 555 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1535 transitions. [2021-07-13 19:45:14,538 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1535 transitions. Word has length 18 [2021-07-13 19:45:14,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:14,538 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1535 transitions. [2021-07-13 19:45:14,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1535 transitions. [2021-07-13 19:45:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:14,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:14,538 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:14,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7687 [2021-07-13 19:45:14,739 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:14,739 INFO L82 PathProgramCache]: Analyzing trace with hash 698126783, now seen corresponding path program 369 times [2021-07-13 19:45:14,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:14,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257474761] [2021-07-13 19:45:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:14,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:14,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257474761] [2021-07-13 19:45:14,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257474761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:14,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972187353] [2021-07-13 19:45:14,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:15,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:45:15,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:15,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:15,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:15,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:15,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:15,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:15,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:15,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:15,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,356 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-07-13 19:45:15,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:15,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:15,397 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:15,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:15,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:15,424 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:45:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:15,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972187353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:15,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:15,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:45:15,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900764765] [2021-07-13 19:45:15,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:45:15,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:15,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:45:15,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:15,515 INFO L87 Difference]: Start difference. First operand 556 states and 1535 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:16,118 INFO L93 Difference]: Finished difference Result 628 states and 1654 transitions. [2021-07-13 19:45:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:45:16,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:16,119 INFO L225 Difference]: With dead ends: 628 [2021-07-13 19:45:16,119 INFO L226 Difference]: Without dead ends: 621 [2021-07-13 19:45:16,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 780.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-07-13 19:45:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 556. [2021-07-13 19:45:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.765765765765766) internal successors, (1535), 555 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1535 transitions. [2021-07-13 19:45:16,125 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1535 transitions. Word has length 18 [2021-07-13 19:45:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:16,125 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1535 transitions. [2021-07-13 19:45:16,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1535 transitions. [2021-07-13 19:45:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:16,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:16,126 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:16,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7710,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:16,326 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:16,326 INFO L82 PathProgramCache]: Analyzing trace with hash -618030521, now seen corresponding path program 370 times [2021-07-13 19:45:16,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:16,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566096281] [2021-07-13 19:45:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:16,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:16,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566096281] [2021-07-13 19:45:16,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566096281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:16,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836341537] [2021-07-13 19:45:16,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:16,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:16,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:16,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:16,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:16,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:16,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:16,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:16,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:16,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:16,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:16,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:16,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:16,954 INFO L628 ElimStorePlain]: treesize reduction 261, result has 23.0 percent of original size [2021-07-13 19:45:16,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:16,958 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:16,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:16,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:16,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:16,988 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:17,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:17,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:17,013 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:452, output treesize:41 [2021-07-13 19:45:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:17,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836341537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:17,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:17,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:45:17,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657579059] [2021-07-13 19:45:17,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:45:17,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:17,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:45:17,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:17,070 INFO L87 Difference]: Start difference. First operand 556 states and 1535 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:17,727 INFO L93 Difference]: Finished difference Result 619 states and 1642 transitions. [2021-07-13 19:45:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:45:17,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:17,728 INFO L225 Difference]: With dead ends: 619 [2021-07-13 19:45:17,728 INFO L226 Difference]: Without dead ends: 612 [2021-07-13 19:45:17,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 756.9ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-13 19:45:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 556. [2021-07-13 19:45:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.765765765765766) internal successors, (1535), 555 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1535 transitions. [2021-07-13 19:45:17,734 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1535 transitions. Word has length 18 [2021-07-13 19:45:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:17,734 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1535 transitions. [2021-07-13 19:45:17,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1535 transitions. [2021-07-13 19:45:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:17,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:17,735 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:17,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7734,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:17,935 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:17,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1928558249, now seen corresponding path program 371 times [2021-07-13 19:45:17,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:17,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660462651] [2021-07-13 19:45:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:18,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:18,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660462651] [2021-07-13 19:45:18,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660462651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:18,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735221846] [2021-07-13 19:45:18,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:18,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:18,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:18,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:18,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:18,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:18,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:18,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:18,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:18,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:18,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:18,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:18,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:18,588 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-07-13 19:45:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:18,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735221846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:18,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:18,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:45:18,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946478640] [2021-07-13 19:45:18,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:45:18,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:18,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:45:18,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:18,693 INFO L87 Difference]: Start difference. First operand 556 states and 1535 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:19,265 INFO L93 Difference]: Finished difference Result 607 states and 1622 transitions. [2021-07-13 19:45:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:45:19,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:19,266 INFO L225 Difference]: With dead ends: 607 [2021-07-13 19:45:19,266 INFO L226 Difference]: Without dead ends: 600 [2021-07-13 19:45:19,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 734.1ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:45:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-13 19:45:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 559. [2021-07-13 19:45:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.7688172043010755) internal successors, (1545), 558 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1545 transitions. [2021-07-13 19:45:19,272 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1545 transitions. Word has length 18 [2021-07-13 19:45:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:19,272 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1545 transitions. [2021-07-13 19:45:19,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1545 transitions. [2021-07-13 19:45:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:19,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:19,274 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:19,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7762 [2021-07-13 19:45:19,475 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash 191780517, now seen corresponding path program 372 times [2021-07-13 19:45:19,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:19,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674714898] [2021-07-13 19:45:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:19,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:19,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674714898] [2021-07-13 19:45:19,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674714898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:19,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038712621] [2021-07-13 19:45:19,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:19,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:19,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:19,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:19,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:19,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:45:19,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:19,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:19,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:19,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:19,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:20,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:20,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:20,008 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-07-13 19:45:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038712621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:20,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:45:20,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950877372] [2021-07-13 19:45:20,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:45:20,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:20,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:45:20,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:20,112 INFO L87 Difference]: Start difference. First operand 559 states and 1545 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:20,620 INFO L93 Difference]: Finished difference Result 611 states and 1627 transitions. [2021-07-13 19:45:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:45:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:20,622 INFO L225 Difference]: With dead ends: 611 [2021-07-13 19:45:20,622 INFO L226 Difference]: Without dead ends: 604 [2021-07-13 19:45:20,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 711.9ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:45:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-13 19:45:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 559. [2021-07-13 19:45:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.7688172043010755) internal successors, (1545), 558 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1545 transitions. [2021-07-13 19:45:20,630 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1545 transitions. Word has length 18 [2021-07-13 19:45:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:20,630 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1545 transitions. [2021-07-13 19:45:20,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1545 transitions. [2021-07-13 19:45:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:20,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:20,631 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:20,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7773 [2021-07-13 19:45:20,833 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1124376787, now seen corresponding path program 373 times [2021-07-13 19:45:20,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:20,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268105496] [2021-07-13 19:45:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:20,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268105496] [2021-07-13 19:45:20,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268105496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316992472] [2021-07-13 19:45:20,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:21,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:21,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:21,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:21,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:21,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:21,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:21,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:45:21,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,469 INFO L628 ElimStorePlain]: treesize reduction 251, result has 23.2 percent of original size [2021-07-13 19:45:21,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:45:21,472 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:21,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:21,503 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:21,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:21,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:21,528 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:45:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:21,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316992472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:21,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:21,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:21,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243593131] [2021-07-13 19:45:21,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:21,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:21,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:21,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:21,595 INFO L87 Difference]: Start difference. First operand 559 states and 1545 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:22,065 INFO L93 Difference]: Finished difference Result 598 states and 1607 transitions. [2021-07-13 19:45:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:45:22,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:22,066 INFO L225 Difference]: With dead ends: 598 [2021-07-13 19:45:22,066 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 19:45:22,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:45:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 19:45:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 559. [2021-07-13 19:45:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.7688172043010755) internal successors, (1545), 558 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1545 transitions. [2021-07-13 19:45:22,072 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1545 transitions. Word has length 18 [2021-07-13 19:45:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:22,072 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1545 transitions. [2021-07-13 19:45:22,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1545 transitions. [2021-07-13 19:45:22,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:22,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:22,073 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:22,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7785 [2021-07-13 19:45:22,273 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:22,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1024419749, now seen corresponding path program 374 times [2021-07-13 19:45:22,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:22,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436367091] [2021-07-13 19:45:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:22,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:22,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436367091] [2021-07-13 19:45:22,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436367091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:22,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963852231] [2021-07-13 19:45:22,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:22,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:22,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:22,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:22,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:22,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:22,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:22,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:45:22,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:22,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,909 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-07-13 19:45:22,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:22,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:22,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:22,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:22,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:22,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:22,968 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:45:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:23,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963852231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:23,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:23,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:23,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827112341] [2021-07-13 19:45:23,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:23,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:23,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:23,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:23,035 INFO L87 Difference]: Start difference. First operand 559 states and 1545 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:23,397 INFO L93 Difference]: Finished difference Result 594 states and 1601 transitions. [2021-07-13 19:45:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:23,399 INFO L225 Difference]: With dead ends: 594 [2021-07-13 19:45:23,399 INFO L226 Difference]: Without dead ends: 587 [2021-07-13 19:45:23,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-07-13 19:45:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 559. [2021-07-13 19:45:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.7688172043010755) internal successors, (1545), 558 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1545 transitions. [2021-07-13 19:45:23,404 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1545 transitions. Word has length 18 [2021-07-13 19:45:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:23,404 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1545 transitions. [2021-07-13 19:45:23,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1545 transitions. [2021-07-13 19:45:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:23,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:23,405 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:23,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7809 [2021-07-13 19:45:23,605 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:23,606 INFO L82 PathProgramCache]: Analyzing trace with hash -883274109, now seen corresponding path program 375 times [2021-07-13 19:45:23,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:23,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113855183] [2021-07-13 19:45:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:23,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:23,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113855183] [2021-07-13 19:45:23,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113855183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:23,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968838941] [2021-07-13 19:45:23,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:23,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:45:23,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:24,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:24,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:24,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:45:24,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:24,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:24,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:24,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-07-13 19:45:24,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:24,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:24,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:24,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-07-13 19:45:24,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:24,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:24,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 19:45:24,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:24,377 INFO L628 ElimStorePlain]: treesize reduction 263, result has 23.5 percent of original size [2021-07-13 19:45:24,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-07-13 19:45:24,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:24,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:24,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:24,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:24,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:24,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:24,438 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:494, output treesize:40 [2021-07-13 19:45:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:24,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968838941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:24,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:24,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:45:24,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486595920] [2021-07-13 19:45:24,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:45:24,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:24,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:45:24,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:24,543 INFO L87 Difference]: Start difference. First operand 559 states and 1545 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:25,202 INFO L93 Difference]: Finished difference Result 636 states and 1702 transitions. [2021-07-13 19:45:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:25,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:25,204 INFO L225 Difference]: With dead ends: 636 [2021-07-13 19:45:25,204 INFO L226 Difference]: Without dead ends: 626 [2021-07-13 19:45:25,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 866.9ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:45:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-07-13 19:45:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 565. [2021-07-13 19:45:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 2.773049645390071) internal successors, (1564), 564 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1564 transitions. [2021-07-13 19:45:25,209 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1564 transitions. Word has length 18 [2021-07-13 19:45:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:25,210 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 1564 transitions. [2021-07-13 19:45:25,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1564 transitions. [2021-07-13 19:45:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:25,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:25,210 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:25,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7832,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:25,411 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1674915455, now seen corresponding path program 376 times [2021-07-13 19:45:25,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:25,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707911835] [2021-07-13 19:45:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:25,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:25,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707911835] [2021-07-13 19:45:25,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707911835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:25,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499764205] [2021-07-13 19:45:25,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:25,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:25,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:25,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:25,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:25,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:25,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:25,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:25,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:25,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:25,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:25,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:45:25,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:25,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:25,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:25,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:25,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:25,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:45:25,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,041 INFO L628 ElimStorePlain]: treesize reduction 228, result has 24.0 percent of original size [2021-07-13 19:45:26,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:26,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:26,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:26,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:26,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:26,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:26,101 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:439, output treesize:40 [2021-07-13 19:45:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:26,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499764205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:26,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:26,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:26,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658109166] [2021-07-13 19:45:26,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:26,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:26,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:26,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:26,202 INFO L87 Difference]: Start difference. First operand 565 states and 1564 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:26,510 INFO L93 Difference]: Finished difference Result 614 states and 1647 transitions. [2021-07-13 19:45:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:26,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:26,511 INFO L225 Difference]: With dead ends: 614 [2021-07-13 19:45:26,511 INFO L226 Difference]: Without dead ends: 607 [2021-07-13 19:45:26,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-13 19:45:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 569. [2021-07-13 19:45:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.7764084507042255) internal successors, (1577), 568 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1577 transitions. [2021-07-13 19:45:26,517 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1577 transitions. Word has length 18 [2021-07-13 19:45:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:26,517 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1577 transitions. [2021-07-13 19:45:26,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1577 transitions. [2021-07-13 19:45:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:26,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:26,517 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:26,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7857,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:26,718 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:26,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:26,718 INFO L82 PathProgramCache]: Analyzing trace with hash 358758151, now seen corresponding path program 377 times [2021-07-13 19:45:26,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:26,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685482631] [2021-07-13 19:45:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:26,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:26,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685482631] [2021-07-13 19:45:26,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685482631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:26,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020551750] [2021-07-13 19:45:26,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:26,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:26,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:26,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:27,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:27,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:27,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:27,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:27,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:45:27,225 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:27,259 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-07-13 19:45:27,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:27,260 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-07-13 19:45:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:27,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020551750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:27,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:27,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:45:27,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777686334] [2021-07-13 19:45:27,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:45:27,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:27,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:45:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:27,331 INFO L87 Difference]: Start difference. First operand 569 states and 1577 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:27,746 INFO L93 Difference]: Finished difference Result 602 states and 1630 transitions. [2021-07-13 19:45:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:27,747 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:27,748 INFO L225 Difference]: With dead ends: 602 [2021-07-13 19:45:27,748 INFO L226 Difference]: Without dead ends: 595 [2021-07-13 19:45:27,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-07-13 19:45:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 569. [2021-07-13 19:45:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.7764084507042255) internal successors, (1577), 568 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1577 transitions. [2021-07-13 19:45:27,753 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1577 transitions. Word has length 18 [2021-07-13 19:45:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:27,754 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1577 transitions. [2021-07-13 19:45:27,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1577 transitions. [2021-07-13 19:45:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:27,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:27,754 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:27,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7884,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:27,955 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:27,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1787412609, now seen corresponding path program 378 times [2021-07-13 19:45:27,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:27,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033803983] [2021-07-13 19:45:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:28,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:28,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033803983] [2021-07-13 19:45:28,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033803983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:28,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757365577] [2021-07-13 19:45:28,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:28,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:28,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:28,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:28,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:28,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:28,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:45:28,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:28,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:28,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:28,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:28,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:28,403 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:69, output treesize:41 [2021-07-13 19:45:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:28,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757365577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:28,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:28,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:45:28,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514373271] [2021-07-13 19:45:28,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:45:28,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:45:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:45:28,468 INFO L87 Difference]: Start difference. First operand 569 states and 1577 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:28,749 INFO L93 Difference]: Finished difference Result 602 states and 1630 transitions. [2021-07-13 19:45:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:28,751 INFO L225 Difference]: With dead ends: 602 [2021-07-13 19:45:28,751 INFO L226 Difference]: Without dead ends: 595 [2021-07-13 19:45:28,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-07-13 19:45:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 569. [2021-07-13 19:45:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.7764084507042255) internal successors, (1577), 568 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1577 transitions. [2021-07-13 19:45:28,756 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1577 transitions. Word has length 18 [2021-07-13 19:45:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:28,756 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1577 transitions. [2021-07-13 19:45:28,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1577 transitions. [2021-07-13 19:45:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:28,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:28,757 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:28,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7894 [2021-07-13 19:45:28,958 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:28,958 INFO L82 PathProgramCache]: Analyzing trace with hash 400770567, now seen corresponding path program 379 times [2021-07-13 19:45:28,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:28,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308582238] [2021-07-13 19:45:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:29,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:29,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308582238] [2021-07-13 19:45:29,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308582238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:29,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115942380] [2021-07-13 19:45:29,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:29,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:29,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:29,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:45:29,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:29,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:29,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:29,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,887 INFO L628 ElimStorePlain]: treesize reduction 234, result has 23.3 percent of original size [2021-07-13 19:45:29,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:45:29,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:29,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:29,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:29,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:29,944 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:45:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:30,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115942380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:30,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:30,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:45:30,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085335886] [2021-07-13 19:45:30,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:45:30,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:45:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:45:30,013 INFO L87 Difference]: Start difference. First operand 569 states and 1577 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:30,375 INFO L93 Difference]: Finished difference Result 600 states and 1627 transitions. [2021-07-13 19:45:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:30,376 INFO L225 Difference]: With dead ends: 600 [2021-07-13 19:45:30,376 INFO L226 Difference]: Without dead ends: 593 [2021-07-13 19:45:30,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:45:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-07-13 19:45:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 569. [2021-07-13 19:45:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.7764084507042255) internal successors, (1577), 568 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1577 transitions. [2021-07-13 19:45:30,381 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1577 transitions. Word has length 18 [2021-07-13 19:45:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:30,381 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1577 transitions. [2021-07-13 19:45:30,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1577 transitions. [2021-07-13 19:45:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:30,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:30,382 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:30,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7909 [2021-07-13 19:45:30,583 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1299264557, now seen corresponding path program 380 times [2021-07-13 19:45:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:30,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273349904] [2021-07-13 19:45:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:30,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:30,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273349904] [2021-07-13 19:45:30,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273349904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:30,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629322583] [2021-07-13 19:45:30,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:30,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:30,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:31,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:31,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:31,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:31,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:31,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:31,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:31,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:31,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:31,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:45:31,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:31,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,380 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-07-13 19:45:31,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:31,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:31,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:31,413 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:31,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:31,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:31,440 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:45:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629322583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:31,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:45:31,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377622951] [2021-07-13 19:45:31,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:45:31,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:31,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:45:31,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:31,547 INFO L87 Difference]: Start difference. First operand 569 states and 1577 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:32,088 INFO L93 Difference]: Finished difference Result 698 states and 1848 transitions. [2021-07-13 19:45:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:32,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:32,089 INFO L225 Difference]: With dead ends: 698 [2021-07-13 19:45:32,089 INFO L226 Difference]: Without dead ends: 691 [2021-07-13 19:45:32,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 816.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-07-13 19:45:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 574. [2021-07-13 19:45:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.7801047120418847) internal successors, (1593), 573 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1593 transitions. [2021-07-13 19:45:32,095 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1593 transitions. Word has length 18 [2021-07-13 19:45:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:32,096 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1593 transitions. [2021-07-13 19:45:32,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1593 transitions. [2021-07-13 19:45:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:32,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:32,096 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:32,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7932,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:32,297 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash -437513175, now seen corresponding path program 381 times [2021-07-13 19:45:32,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:32,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277778752] [2021-07-13 19:45:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:32,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:32,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277778752] [2021-07-13 19:45:32,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277778752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:32,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380719490] [2021-07-13 19:45:32,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:32,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:32,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:33,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:33,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:45:33,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:33,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:33,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:33,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:33,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:33,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:33,110 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-07-13 19:45:33,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:45:33,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:33,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:33,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:33,145 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:33,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:33,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:33,171 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-07-13 19:45:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:33,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380719490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:33,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:33,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:45:33,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323228081] [2021-07-13 19:45:33,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:45:33,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:33,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:45:33,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:33,276 INFO L87 Difference]: Start difference. First operand 574 states and 1593 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:33,832 INFO L93 Difference]: Finished difference Result 700 states and 1850 transitions. [2021-07-13 19:45:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:33,833 INFO L225 Difference]: With dead ends: 700 [2021-07-13 19:45:33,833 INFO L226 Difference]: Without dead ends: 693 [2021-07-13 19:45:33,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-07-13 19:45:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 573. [2021-07-13 19:45:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.777972027972028) internal successors, (1589), 572 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1589 transitions. [2021-07-13 19:45:33,839 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1589 transitions. Word has length 18 [2021-07-13 19:45:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:33,839 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1589 transitions. [2021-07-13 19:45:33,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1589 transitions. [2021-07-13 19:45:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:33,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:33,840 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:34,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7955,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:34,041 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:34,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1753670479, now seen corresponding path program 382 times [2021-07-13 19:45:34,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:34,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798872198] [2021-07-13 19:45:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:34,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798872198] [2021-07-13 19:45:34,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798872198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680042959] [2021-07-13 19:45:34,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:34,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:34,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:34,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:34,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:45:34,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:34,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,856 INFO L628 ElimStorePlain]: treesize reduction 152, result has 32.4 percent of original size [2021-07-13 19:45:34,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:34,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:34,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:34,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:34,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:34,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:34,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:34,912 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-07-13 19:45:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680042959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:34,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:45:34,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208703708] [2021-07-13 19:45:34,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:45:34,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:45:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:34,982 INFO L87 Difference]: Start difference. First operand 573 states and 1589 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:35,454 INFO L93 Difference]: Finished difference Result 687 states and 1829 transitions. [2021-07-13 19:45:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:35,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:35,455 INFO L225 Difference]: With dead ends: 687 [2021-07-13 19:45:35,455 INFO L226 Difference]: Without dead ends: 680 [2021-07-13 19:45:35,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 752.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-07-13 19:45:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 572. [2021-07-13 19:45:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.777583187390543) internal successors, (1586), 571 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1586 transitions. [2021-07-13 19:45:35,462 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1586 transitions. Word has length 18 [2021-07-13 19:45:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:35,462 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1586 transitions. [2021-07-13 19:45:35,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1586 transitions. [2021-07-13 19:45:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:35,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:35,462 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:35,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7978,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:35,665 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash 395126057, now seen corresponding path program 383 times [2021-07-13 19:45:35,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:35,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741574970] [2021-07-13 19:45:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:35,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:35,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741574970] [2021-07-13 19:45:35,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741574970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:35,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172833195] [2021-07-13 19:45:35,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:35,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:35,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:35,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:36,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:36,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:36,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-07-13 19:45:36,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:36,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:36,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-07-13 19:45:36,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:36,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:36,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:36,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,423 INFO L628 ElimStorePlain]: treesize reduction 234, result has 23.3 percent of original size [2021-07-13 19:45:36,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:45:36,427 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:36,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:36,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:36,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:36,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:36,479 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:45:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172833195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:36,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:45:36,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359177539] [2021-07-13 19:45:36,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:45:36,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:36,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:45:36,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:36,556 INFO L87 Difference]: Start difference. First operand 572 states and 1586 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:37,125 INFO L93 Difference]: Finished difference Result 686 states and 1826 transitions. [2021-07-13 19:45:37,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:37,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:37,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:37,126 INFO L225 Difference]: With dead ends: 686 [2021-07-13 19:45:37,126 INFO L226 Difference]: Without dead ends: 679 [2021-07-13 19:45:37,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 827.0ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:45:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-07-13 19:45:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 572. [2021-07-13 19:45:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.777583187390543) internal successors, (1586), 571 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1586 transitions. [2021-07-13 19:45:37,132 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1586 transitions. Word has length 18 [2021-07-13 19:45:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:37,132 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1586 transitions. [2021-07-13 19:45:37,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1586 transitions. [2021-07-13 19:45:37,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:37,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:37,133 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:37,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8003 [2021-07-13 19:45:37,333 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1711658063, now seen corresponding path program 384 times [2021-07-13 19:45:37,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:37,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467023461] [2021-07-13 19:45:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:37,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:37,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467023461] [2021-07-13 19:45:37,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467023461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:37,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317209868] [2021-07-13 19:45:37,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:37,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:37,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:37,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:37,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:37,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:37,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:37,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-13 19:45:37,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:37,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:37,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:37,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:37,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:37,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-07-13 19:45:37,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:38,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-07-13 19:45:38,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,085 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-07-13 19:45:38,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:45:38,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:38,090 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:38,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:38,118 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:38,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:45:38,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:38,143 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-07-13 19:45:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:38,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317209868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:38,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:38,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 19:45:38,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394049562] [2021-07-13 19:45:38,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:45:38,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:38,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:45:38,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:45:38,213 INFO L87 Difference]: Start difference. First operand 572 states and 1586 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:38,921 INFO L93 Difference]: Finished difference Result 686 states and 1826 transitions. [2021-07-13 19:45:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:38,922 INFO L225 Difference]: With dead ends: 686 [2021-07-13 19:45:38,923 INFO L226 Difference]: Without dead ends: 679 [2021-07-13 19:45:38,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 893.0ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:45:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-07-13 19:45:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 572. [2021-07-13 19:45:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.777583187390543) internal successors, (1586), 571 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1586 transitions. [2021-07-13 19:45:38,928 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1586 transitions. Word has length 18 [2021-07-13 19:45:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:38,928 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1586 transitions. [2021-07-13 19:45:38,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1586 transitions. [2021-07-13 19:45:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:45:38,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:38,929 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:39,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8029,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,130 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1254611813, now seen corresponding path program 385 times [2021-07-13 19:45:39,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:39,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012555100] [2021-07-13 19:45:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012555100] [2021-07-13 19:45:39,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012555100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128059160] [2021-07-13 19:45:39,310 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 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:45:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:39,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:39,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:39,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:39,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:45:39,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,540 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:39,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:45:39,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:45:39,547 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:39,549 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:45:39,552 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:45:39,588 INFO L628 ElimStorePlain]: treesize reduction 34, result has 54.7 percent of original size [2021-07-13 19:45:39,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:45:39,589 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:248, output treesize:41 [2021-07-13 19:45:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128059160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:39,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:45:39,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738790928] [2021-07-13 19:45:39,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:39,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:39,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:39,653 INFO L87 Difference]: Start difference. First operand 572 states and 1586 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:40,222 INFO L93 Difference]: Finished difference Result 684 states and 1823 transitions. [2021-07-13 19:45:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:40,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:45:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:40,223 INFO L225 Difference]: With dead ends: 684 [2021-07-13 19:45:40,223 INFO L226 Difference]: Without dead ends: 677 [2021-07-13 19:45:40,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-07-13 19:45:40,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 574. [2021-07-13 19:45:40,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.7731239092495636) internal successors, (1589), 573 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1589 transitions. [2021-07-13 19:45:40,229 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1589 transitions. Word has length 18 [2021-07-13 19:45:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:40,229 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1589 transitions. [2021-07-13 19:45:40,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,229 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1589 transitions. [2021-07-13 19:45:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:45:40,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:40,230 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:40,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8055 [2021-07-13 19:45:40,430 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:40,431 INFO L82 PathProgramCache]: Analyzing trace with hash -100662137, now seen corresponding path program 386 times [2021-07-13 19:45:40,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:40,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602187088] [2021-07-13 19:45:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:45:40,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:40,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602187088] [2021-07-13 19:45:40,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602187088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:40,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656697566] [2021-07-13 19:45:40,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:40,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:40,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:45:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:45:40,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656697566] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:45:40,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:45:40,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-07-13 19:45:40,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004873227] [2021-07-13 19:45:40,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:45:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:45:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:45:40,556 INFO L87 Difference]: Start difference. First operand 574 states and 1589 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:40,563 INFO L93 Difference]: Finished difference Result 462 states and 1003 transitions. [2021-07-13 19:45:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:45:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:45:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:40,564 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:45:40,564 INFO L226 Difference]: Without dead ends: 424 [2021-07-13 19:45:40,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:45:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-13 19:45:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 298. [2021-07-13 19:45:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.1077441077441077) internal successors, (626), 297 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 626 transitions. [2021-07-13 19:45:40,567 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 626 transitions. Word has length 19 [2021-07-13 19:45:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:40,567 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 626 transitions. [2021-07-13 19:45:40,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 626 transitions. [2021-07-13 19:45:40,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:45:40,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:40,567 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:40,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8066 [2021-07-13 19:45:40,768 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:40,768 INFO L82 PathProgramCache]: Analyzing trace with hash -199901446, now seen corresponding path program 387 times [2021-07-13 19:45:40,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:40,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373981682] [2021-07-13 19:45:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:45:40,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:40,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373981682] [2021-07-13 19:45:40,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373981682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:40,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583182180] [2021-07-13 19:45:40,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:40,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:45:40,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:45:40,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583182180] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:45:40,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:45:40,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 7 [2021-07-13 19:45:40,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289435196] [2021-07-13 19:45:40,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:45:40,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:40,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:45:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:45:40,893 INFO L87 Difference]: Start difference. First operand 298 states and 626 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:40,898 INFO L93 Difference]: Finished difference Result 175 states and 252 transitions. [2021-07-13 19:45:40,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:45:40,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:45:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:40,899 INFO L225 Difference]: With dead ends: 175 [2021-07-13 19:45:40,899 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 19:45:40,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:45:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 19:45:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 19:45:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 19:45:40,899 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-07-13 19:45:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:40,899 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 19:45:40,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:40,899 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 19:45:40,899 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 19:45:41,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8067 [2021-07-13 19:45:41,103 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:45:41,105 INFO L202 PluginConnector]: Adding new model name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:45:41 BasicIcfg [2021-07-13 19:45:41,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:45:41,105 INFO L168 Benchmark]: Toolchain (without parser) took 458582.71 ms. Allocated memory was 189.8 MB in the beginning and 388.0 MB in the end (delta: 198.2 MB). Free memory was 169.1 MB in the beginning and 299.6 MB in the end (delta: -130.5 MB). Peak memory consumption was 68.9 MB. Max. memory is 8.0 GB. [2021-07-13 19:45:41,106 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 170.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:45:41,106 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.60 ms. Allocated memory is still 189.8 MB. Free memory was 169.0 MB in the beginning and 167.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:45:41,106 INFO L168 Benchmark]: Boogie Preprocessor took 24.23 ms. Allocated memory is still 189.8 MB. Free memory was 167.6 MB in the beginning and 166.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:45:41,106 INFO L168 Benchmark]: RCFGBuilder took 427.32 ms. Allocated memory is still 189.8 MB. Free memory was 166.4 MB in the beginning and 142.0 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:45:41,106 INFO L168 Benchmark]: TraceAbstraction took 458096.39 ms. Allocated memory was 189.8 MB in the beginning and 388.0 MB in the end (delta: 198.2 MB). Free memory was 141.5 MB in the beginning and 299.6 MB in the end (delta: -158.1 MB). Peak memory consumption was 41.6 MB. Max. memory is 8.0 GB. [2021-07-13 19:45:41,106 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 170.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.60 ms. Allocated memory is still 189.8 MB. Free memory was 169.0 MB in the beginning and 167.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.23 ms. Allocated memory is still 189.8 MB. Free memory was 167.6 MB in the beginning and 166.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 427.32 ms. Allocated memory is still 189.8 MB. Free memory was 166.4 MB in the beginning and 142.0 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 458096.39 ms. Allocated memory was 189.8 MB in the beginning and 388.0 MB in the end (delta: 198.2 MB). Free memory was 141.5 MB in the beginning and 299.6 MB in the end (delta: -158.1 MB). Peak memory consumption was 41.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 81]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 457982.0ms, OverallIterations: 399, TraceHistogramMax: 4, EmptinessCheckTime: 176.7ms, AutomataDifference: 166258.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11846 SDtfs, 16269 SDslu, 89201 SDs, 0 SdLazy, 121341 SolverSat, 4285 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 50106.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12277 GetRequests, 4602 SyntacticMatches, 495 SemanticMatches, 7180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28511 ImplicationChecksByTransitivity, 212381.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=574occurred in iteration=392, InterpolantAutomatonStates: 5215, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1153.9ms AutomataMinimizationTime, 399 MinimizatonAttempts, 16017 StatesRemovedByMinimization, 395 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1872.8ms SsaConstructionTime, 5884.6ms SatisfiabilityAnalysisTime, 184650.0ms InterpolantComputationTime, 13521 NumberOfCodeBlocks, 13521 NumberOfCodeBlocksAsserted, 1287 NumberOfCheckSat, 12733 ConstructedInterpolants, 294 QuantifiedInterpolants, 196732 SizeOfPredicates, 3132 NumberOfNonLiveVariables, 34294 ConjunctsInSsa, 10707 ConjunctsInUnsatCore, 788 InterpolantComputations, 14 PerfectInterpolantSequences, 773/7623 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...