/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:18:21,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:18:21,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:18:21,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:18:21,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:18:21,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:18:21,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:18:21,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:18:21,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:18:21,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:18:21,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:18:21,404 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:18:21,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:18:21,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:18:21,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:18:21,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:18:21,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:18:21,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:18:21,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:18:21,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:18:21,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:18:21,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:18:21,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:18:21,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:18:21,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:18:21,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:18:21,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:18:21,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:18:21,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:18:21,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:18:21,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:18:21,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:18:21,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:18:21,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:18:21,409 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:18:21,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:18:21,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:18:21,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:18:21,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:18:21,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:18:21,759 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:18:21,760 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:18:21,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2021-07-13 20:18:21,761 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2021-07-13 20:18:21,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:18:21,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:18:21,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:18:21,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:18:21,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:18:21,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... [2021-07-13 20:18:21,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... [2021-07-13 20:18:21,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:18:21,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:18:21,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:18:21,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:18:21,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... [2021-07-13 20:18:21,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... [2021-07-13 20:18:21,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... [2021-07-13 20:18:21,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... [2021-07-13 20:18:21,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... [2021-07-13 20:18:21,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... [2021-07-13 20:18:21,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... [2021-07-13 20:18:21,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:18:21,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:18:21,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:18:21,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:18:21,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:18:21,903 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:18:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:18:21,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:18:21,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:18:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:18:21,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:18:21,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:18:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:18:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:18:21,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:18:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:18:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:18:21,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 20:18:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 20:18:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 20:18:21,906 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:18:22,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:18:22,187 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:18:22,188 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:18:22 BoogieIcfgContainer [2021-07-13 20:18:22,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:18:22,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:18:22,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:18:22,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:18:22,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:21" (1/2) ... [2021-07-13 20:18:22,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66594ad2 and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:18:22, skipping insertion in model container [2021-07-13 20:18:22,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:18:22" (2/2) ... [2021-07-13 20:18:22,195 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2021-07-13 20:18:22,203 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:18:22,203 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:18:22,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:18:22,217 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:18:22,281 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 20:18:22,300 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 20:18:22,316 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:18:22,316 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:18:22,317 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:18:22,317 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:18:22,317 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:18:22,317 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:18:22,317 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:18:22,317 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:18:22,326 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-07-13 20:18:22,393 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:18:22,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:22,419 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:22,419 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:22,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:22,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1014933584, now seen corresponding path program 1 times [2021-07-13 20:18:22,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:22,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839228635] [2021-07-13 20:18:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:22,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:22,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839228635] [2021-07-13 20:18:22,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839228635] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:22,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:22,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:18:22,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926467366] [2021-07-13 20:18:22,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:18:22,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:18:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:22,606 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 20:18:22,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:22,673 INFO L93 Difference]: Finished difference Result 691 states and 2633 transitions. [2021-07-13 20:18:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:22,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 19 [2021-07-13 20:18:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:22,703 INFO L225 Difference]: With dead ends: 691 [2021-07-13 20:18:22,703 INFO L226 Difference]: Without dead ends: 691 [2021-07-13 20:18:22,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-07-13 20:18:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2021-07-13 20:18:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2021-07-13 20:18:22,796 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2021-07-13 20:18:22,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:22,797 INFO L482 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2021-07-13 20:18:22,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 20:18:22,798 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2021-07-13 20:18:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:18:22,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:22,802 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:22,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:18:22,802 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:22,803 INFO L82 PathProgramCache]: Analyzing trace with hash 810519764, now seen corresponding path program 1 times [2021-07-13 20:18:22,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:22,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289553127] [2021-07-13 20:18:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:22,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:22,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289553127] [2021-07-13 20:18:22,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289553127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:22,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176213255] [2021-07-13 20:18:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:18:22,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:23,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176213255] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:23,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:18:23,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-07-13 20:18:23,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288685910] [2021-07-13 20:18:23,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:18:23,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:23,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:18:23,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:23,039 INFO L87 Difference]: Start difference. First operand 691 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 20:18:23,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:23,082 INFO L93 Difference]: Finished difference Result 1250 states and 4705 transitions. [2021-07-13 20:18:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:18:23,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 22 [2021-07-13 20:18:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:23,093 INFO L225 Difference]: With dead ends: 1250 [2021-07-13 20:18:23,093 INFO L226 Difference]: Without dead ends: 1250 [2021-07-13 20:18:23,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-07-13 20:18:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2021-07-13 20:18:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2021-07-13 20:18:23,149 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2021-07-13 20:18:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:23,149 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2021-07-13 20:18:23,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 20:18:23,150 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2021-07-13 20:18:23,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:18:23,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:23,153 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:23,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 20:18:23,356 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash 234896854, now seen corresponding path program 1 times [2021-07-13 20:18:23,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:23,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693276258] [2021-07-13 20:18:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:23,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:23,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693276258] [2021-07-13 20:18:23,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693276258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:23,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815883373] [2021-07-13 20:18:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:23,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:18:23,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:23,630 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 11 treesize of output 7 [2021-07-13 20:18:23,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:23,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:23,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:23,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:18:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:23,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815883373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:23,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:23,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-13 20:18:23,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324903336] [2021-07-13 20:18:23,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:18:23,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:23,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:18:23,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:18:23,691 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:23,782 INFO L93 Difference]: Finished difference Result 1934 states and 7455 transitions. [2021-07-13 20:18:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:18:23,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:18:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:23,795 INFO L225 Difference]: With dead ends: 1934 [2021-07-13 20:18:23,795 INFO L226 Difference]: Without dead ends: 1807 [2021-07-13 20:18:23,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:18:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-07-13 20:18:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2021-07-13 20:18:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2021-07-13 20:18:23,859 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2021-07-13 20:18:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:23,860 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2021-07-13 20:18:23,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2021-07-13 20:18:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:18:23,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:23,865 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:24,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:24,073 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:24,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1112061528, now seen corresponding path program 2 times [2021-07-13 20:18:24,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:24,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276648667] [2021-07-13 20:18:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:24,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:24,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276648667] [2021-07-13 20:18:24,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276648667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:24,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258750359] [2021-07-13 20:18:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:24,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:24,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:24,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:18:24,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:24,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258750359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:24,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:24,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-13 20:18:24,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060670046] [2021-07-13 20:18:24,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:18:24,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:18:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:18:24,267 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:24,335 INFO L93 Difference]: Finished difference Result 2404 states and 8959 transitions. [2021-07-13 20:18:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:18:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:18:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:24,351 INFO L225 Difference]: With dead ends: 2404 [2021-07-13 20:18:24,351 INFO L226 Difference]: Without dead ends: 2234 [2021-07-13 20:18:24,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:18:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-07-13 20:18:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2021-07-13 20:18:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2021-07-13 20:18:24,448 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2021-07-13 20:18:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:24,448 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2021-07-13 20:18:24,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2021-07-13 20:18:24,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:18:24,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:24,455 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:24,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:24,673 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:24,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1469512084, now seen corresponding path program 1 times [2021-07-13 20:18:24,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:24,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206945474] [2021-07-13 20:18:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:18:24,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:24,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206945474] [2021-07-13 20:18:24,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206945474] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:24,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:24,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:18:24,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482300396] [2021-07-13 20:18:24,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:18:24,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:24,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:18:24,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:18:24,713 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:24,774 INFO L93 Difference]: Finished difference Result 3426 states and 12683 transitions. [2021-07-13 20:18:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:18:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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 26 [2021-07-13 20:18:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:24,800 INFO L225 Difference]: With dead ends: 3426 [2021-07-13 20:18:24,801 INFO L226 Difference]: Without dead ends: 3255 [2021-07-13 20:18:24,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:18:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-07-13 20:18:24,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2021-07-13 20:18:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2021-07-13 20:18:24,919 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2021-07-13 20:18:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:24,920 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2021-07-13 20:18:24,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2021-07-13 20:18:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:18:24,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:24,933 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:24,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:18:24,934 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:24,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1414582092, now seen corresponding path program 3 times [2021-07-13 20:18:24,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:24,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928025146] [2021-07-13 20:18:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:25,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:25,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928025146] [2021-07-13 20:18:25,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928025146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:25,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826195638] [2021-07-13 20:18:25,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:25,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:18:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:18:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:25,278 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:18:25,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:18:25,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:25,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:25,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:25,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:3 [2021-07-13 20:18:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:25,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826195638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:25,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:25,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 20:18:25,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732114058] [2021-07-13 20:18:25,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:18:25,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:25,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:18:25,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:18:25,316 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:25,783 INFO L93 Difference]: Finished difference Result 7730 states and 29466 transitions. [2021-07-13 20:18:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:18:25,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:18:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:25,843 INFO L225 Difference]: With dead ends: 7730 [2021-07-13 20:18:25,843 INFO L226 Difference]: Without dead ends: 7083 [2021-07-13 20:18:25,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:18:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2021-07-13 20:18:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 2938. [2021-07-13 20:18:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.892066734763364) internal successors, (11431), 2937 states have internal predecessors, (11431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11431 transitions. [2021-07-13 20:18:25,996 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11431 transitions. Word has length 29 [2021-07-13 20:18:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:25,997 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 11431 transitions. [2021-07-13 20:18:25,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11431 transitions. [2021-07-13 20:18:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:18:26,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:26,008 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:26,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:26,225 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:26,225 INFO L82 PathProgramCache]: Analyzing trace with hash -690178897, now seen corresponding path program 1 times [2021-07-13 20:18:26,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:26,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757388492] [2021-07-13 20:18:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:18:26,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:26,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757388492] [2021-07-13 20:18:26,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757388492] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:26,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:26,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:18:26,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854857] [2021-07-13 20:18:26,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:18:26,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:26,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:18:26,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:26,260 INFO L87 Difference]: Start difference. First operand 2938 states and 11431 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 20:18:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:26,284 INFO L93 Difference]: Finished difference Result 2938 states and 11171 transitions. [2021-07-13 20:18:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 29 [2021-07-13 20:18:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:26,301 INFO L225 Difference]: With dead ends: 2938 [2021-07-13 20:18:26,301 INFO L226 Difference]: Without dead ends: 2938 [2021-07-13 20:18:26,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-07-13 20:18:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-07-13 20:18:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.8035410282601294) internal successors, (11171), 2937 states have internal predecessors, (11171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11171 transitions. [2021-07-13 20:18:26,403 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11171 transitions. Word has length 29 [2021-07-13 20:18:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:26,403 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 11171 transitions. [2021-07-13 20:18:26,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 20:18:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11171 transitions. [2021-07-13 20:18:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:18:26,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:26,413 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:26,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 20:18:26,413 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash 866424555, now seen corresponding path program 2 times [2021-07-13 20:18:26,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:26,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541936264] [2021-07-13 20:18:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:18:26,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:26,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541936264] [2021-07-13 20:18:26,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541936264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:26,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35608605] [2021-07-13 20:18:26,441 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:26,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:26,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:26,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:18:26,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:18:26,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35608605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:26,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:26,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-07-13 20:18:26,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351580117] [2021-07-13 20:18:26,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:18:26,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:26,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:18:26,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:18:26,576 INFO L87 Difference]: Start difference. First operand 2938 states and 11171 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:26,866 INFO L93 Difference]: Finished difference Result 9089 states and 33364 transitions. [2021-07-13 20:18:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:18:26,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:18:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:26,905 INFO L225 Difference]: With dead ends: 9089 [2021-07-13 20:18:26,906 INFO L226 Difference]: Without dead ends: 9039 [2021-07-13 20:18:26,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-07-13 20:18:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 3700. [2021-07-13 20:18:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 3.9689105163557716) internal successors, (14681), 3699 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 14681 transitions. [2021-07-13 20:18:27,111 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 14681 transitions. Word has length 29 [2021-07-13 20:18:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:27,114 INFO L482 AbstractCegarLoop]: Abstraction has 3700 states and 14681 transitions. [2021-07-13 20:18:27,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 14681 transitions. [2021-07-13 20:18:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:18:27,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:27,127 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:27,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:27,340 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash -595430549, now seen corresponding path program 3 times [2021-07-13 20:18:27,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:27,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875153574] [2021-07-13 20:18:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:18:27,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:27,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875153574] [2021-07-13 20:18:27,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875153574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:27,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755729089] [2021-07-13 20:18:27,380 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:27,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:18:27,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:27,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:18:27,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:18:27,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755729089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:27,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:27,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-07-13 20:18:27,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17420504] [2021-07-13 20:18:27,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:18:27,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:27,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:18:27,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:18:27,510 INFO L87 Difference]: Start difference. First operand 3700 states and 14681 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:27,788 INFO L93 Difference]: Finished difference Result 8113 states and 29971 transitions. [2021-07-13 20:18:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:18:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:18:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:27,830 INFO L225 Difference]: With dead ends: 8113 [2021-07-13 20:18:27,831 INFO L226 Difference]: Without dead ends: 8113 [2021-07-13 20:18:27,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8113 states. [2021-07-13 20:18:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8113 to 3985. [2021-07-13 20:18:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3985 states, 3984 states have (on average 3.9485441767068274) internal successors, (15731), 3984 states have internal predecessors, (15731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 15731 transitions. [2021-07-13 20:18:28,094 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 15731 transitions. Word has length 29 [2021-07-13 20:18:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:28,094 INFO L482 AbstractCegarLoop]: Abstraction has 3985 states and 15731 transitions. [2021-07-13 20:18:28,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 15731 transitions. [2021-07-13 20:18:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:18:28,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:28,109 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:28,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:28,310 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:28,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:28,311 INFO L82 PathProgramCache]: Analyzing trace with hash 805726646, now seen corresponding path program 4 times [2021-07-13 20:18:28,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:28,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859420804] [2021-07-13 20:18:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:28,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:28,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859420804] [2021-07-13 20:18:28,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859420804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:28,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441020066] [2021-07-13 20:18:28,375 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:28,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:28,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:18:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:28,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441020066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:28,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:28,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-07-13 20:18:28,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225741929] [2021-07-13 20:18:28,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:18:28,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:28,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:18:28,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:18:28,481 INFO L87 Difference]: Start difference. First operand 3985 states and 15731 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:28,592 INFO L93 Difference]: Finished difference Result 7893 states and 31090 transitions. [2021-07-13 20:18:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:18:28,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:18:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:28,628 INFO L225 Difference]: With dead ends: 7893 [2021-07-13 20:18:28,629 INFO L226 Difference]: Without dead ends: 7621 [2021-07-13 20:18:28,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:18:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7621 states. [2021-07-13 20:18:28,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7621 to 6363. [2021-07-13 20:18:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6363 states, 6362 states have (on average 4.042125117887457) internal successors, (25716), 6362 states have internal predecessors, (25716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6363 states to 6363 states and 25716 transitions. [2021-07-13 20:18:28,947 INFO L78 Accepts]: Start accepts. Automaton has 6363 states and 25716 transitions. Word has length 31 [2021-07-13 20:18:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:28,948 INFO L482 AbstractCegarLoop]: Abstraction has 6363 states and 25716 transitions. [2021-07-13 20:18:28,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6363 states and 25716 transitions. [2021-07-13 20:18:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:18:28,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:28,967 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:29,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:18:29,191 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1071796465, now seen corresponding path program 4 times [2021-07-13 20:18:29,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:29,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162836150] [2021-07-13 20:18:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:29,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162836150] [2021-07-13 20:18:29,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162836150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843030698] [2021-07-13 20:18:29,312 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:29,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:29,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:29,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:18:29,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:29,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843030698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:29,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:29,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 20:18:29,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906630908] [2021-07-13 20:18:29,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:18:29,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:29,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:18:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:18:29,422 INFO L87 Difference]: Start difference. First operand 6363 states and 25716 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:29,493 INFO L93 Difference]: Finished difference Result 7990 states and 31805 transitions. [2021-07-13 20:18:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:18:29,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:18:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:29,531 INFO L225 Difference]: With dead ends: 7990 [2021-07-13 20:18:29,531 INFO L226 Difference]: Without dead ends: 7990 [2021-07-13 20:18:29,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:18:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-07-13 20:18:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6023. [2021-07-13 20:18:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6023 states, 6022 states have (on average 3.988542012620392) internal successors, (24019), 6022 states have internal predecessors, (24019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 24019 transitions. [2021-07-13 20:18:29,846 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 24019 transitions. Word has length 32 [2021-07-13 20:18:29,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:29,847 INFO L482 AbstractCegarLoop]: Abstraction has 6023 states and 24019 transitions. [2021-07-13 20:18:29,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 24019 transitions. [2021-07-13 20:18:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:29,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:29,866 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:30,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 20:18:30,081 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2103834406, now seen corresponding path program 5 times [2021-07-13 20:18:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:30,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727179765] [2021-07-13 20:18:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:30,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:30,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727179765] [2021-07-13 20:18:30,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727179765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:30,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878121416] [2021-07-13 20:18:30,206 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:30,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:18:30,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:30,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:18:30,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:30,450 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:18:30,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:18:30,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:30,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:30,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:30,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:3 [2021-07-13 20:18:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:30,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878121416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:30,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:30,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 20:18:30,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988327146] [2021-07-13 20:18:30,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:18:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:30,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:18:30,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:30,493 INFO L87 Difference]: Start difference. First operand 6023 states and 24019 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:31,143 INFO L93 Difference]: Finished difference Result 14134 states and 55947 transitions. [2021-07-13 20:18:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:18:31,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:31,194 INFO L225 Difference]: With dead ends: 14134 [2021-07-13 20:18:31,194 INFO L226 Difference]: Without dead ends: 13721 [2021-07-13 20:18:31,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 382.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:18:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13721 states. [2021-07-13 20:18:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13721 to 6348. [2021-07-13 20:18:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 6347 states have (on average 4.00330864975579) internal successors, (25409), 6347 states have internal predecessors, (25409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 25409 transitions. [2021-07-13 20:18:31,436 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 25409 transitions. Word has length 34 [2021-07-13 20:18:31,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:31,436 INFO L482 AbstractCegarLoop]: Abstraction has 6348 states and 25409 transitions. [2021-07-13 20:18:31,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 25409 transitions. [2021-07-13 20:18:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:31,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:31,457 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:31,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:31,682 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:31,682 INFO L82 PathProgramCache]: Analyzing trace with hash 616045325, now seen corresponding path program 5 times [2021-07-13 20:18:31,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:31,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563231659] [2021-07-13 20:18:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:31,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:31,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563231659] [2021-07-13 20:18:31,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563231659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:31,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310313584] [2021-07-13 20:18:31,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:31,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:18:31,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:31,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:18:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:32,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:32,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-07-13 20:18:32,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:18:32,180 INFO L628 ElimStorePlain]: treesize reduction 16, result has 66.7 percent of original size [2021-07-13 20:18:32,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:32,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:28 [2021-07-13 20:18:32,309 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 27 treesize of output 21 [2021-07-13 20:18:32,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:32,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:32,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:32,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:18:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:32,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310313584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:32,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:32,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:18:32,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83104786] [2021-07-13 20:18:32,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:18:32,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:18:32,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:32,340 INFO L87 Difference]: Start difference. First operand 6348 states and 25409 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:33,551 INFO L93 Difference]: Finished difference Result 17828 states and 69084 transitions. [2021-07-13 20:18:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:18:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:33,669 INFO L225 Difference]: With dead ends: 17828 [2021-07-13 20:18:33,669 INFO L226 Difference]: Without dead ends: 17753 [2021-07-13 20:18:33,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 666.8ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:18:33,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17753 states. [2021-07-13 20:18:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17753 to 7658. [2021-07-13 20:18:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7658 states, 7657 states have (on average 4.0185451221104875) internal successors, (30770), 7657 states have internal predecessors, (30770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7658 states to 7658 states and 30770 transitions. [2021-07-13 20:18:33,949 INFO L78 Accepts]: Start accepts. Automaton has 7658 states and 30770 transitions. Word has length 34 [2021-07-13 20:18:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:33,949 INFO L482 AbstractCegarLoop]: Abstraction has 7658 states and 30770 transitions. [2021-07-13 20:18:33,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7658 states and 30770 transitions. [2021-07-13 20:18:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:33,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:33,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:34,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:34,197 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:34,198 INFO L82 PathProgramCache]: Analyzing trace with hash -158773189, now seen corresponding path program 6 times [2021-07-13 20:18:34,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:34,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750495249] [2021-07-13 20:18:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:34,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:34,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750495249] [2021-07-13 20:18:34,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750495249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:34,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298255033] [2021-07-13 20:18:34,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:34,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:18:34,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:18:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:34,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:34,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2021-07-13 20:18:34,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:18:34,668 INFO L628 ElimStorePlain]: treesize reduction 30, result has 54.5 percent of original size [2021-07-13 20:18:34,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:18:34,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:30 [2021-07-13 20:18:34,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-13 20:18:34,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:34,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:34,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:34,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:18:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:34,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298255033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:34,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:34,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:18:34,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546470393] [2021-07-13 20:18:34,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:18:34,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:34,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:18:34,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:34,805 INFO L87 Difference]: Start difference. First operand 7658 states and 30770 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:35,822 INFO L93 Difference]: Finished difference Result 26431 states and 104477 transitions. [2021-07-13 20:18:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:18:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:35,911 INFO L225 Difference]: With dead ends: 26431 [2021-07-13 20:18:35,912 INFO L226 Difference]: Without dead ends: 26356 [2021-07-13 20:18:35,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:18:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26356 states. [2021-07-13 20:18:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26356 to 8714. [2021-07-13 20:18:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8714 states, 8713 states have (on average 4.058188913118329) internal successors, (35359), 8713 states have internal predecessors, (35359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8714 states to 8714 states and 35359 transitions. [2021-07-13 20:18:36,435 INFO L78 Accepts]: Start accepts. Automaton has 8714 states and 35359 transitions. Word has length 34 [2021-07-13 20:18:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:36,435 INFO L482 AbstractCegarLoop]: Abstraction has 8714 states and 35359 transitions. [2021-07-13 20:18:36,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8714 states and 35359 transitions. [2021-07-13 20:18:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:36,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:36,459 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:36,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:18:36,661 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:36,661 INFO L82 PathProgramCache]: Analyzing trace with hash -824736107, now seen corresponding path program 7 times [2021-07-13 20:18:36,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:36,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072779766] [2021-07-13 20:18:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:36,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:36,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072779766] [2021-07-13 20:18:36,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072779766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:36,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417366143] [2021-07-13 20:18:36,762 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:18:36,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:37,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:18:37,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:37,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:37,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:37,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-07-13 20:18:37,091 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:37,091 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:18:37,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:37,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:37,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:37,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:18:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:37,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417366143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:37,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:37,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:18:37,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965064601] [2021-07-13 20:18:37,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:18:37,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:37,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:18:37,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:37,127 INFO L87 Difference]: Start difference. First operand 8714 states and 35359 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:37,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:37,677 INFO L93 Difference]: Finished difference Result 19981 states and 79468 transitions. [2021-07-13 20:18:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:18:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:37,810 INFO L225 Difference]: With dead ends: 19981 [2021-07-13 20:18:37,810 INFO L226 Difference]: Without dead ends: 19826 [2021-07-13 20:18:37,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:18:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19826 states. [2021-07-13 20:18:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19826 to 8750. [2021-07-13 20:18:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 8749 states have (on average 4.062750028574694) internal successors, (35545), 8749 states have internal predecessors, (35545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 35545 transitions. [2021-07-13 20:18:38,167 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 35545 transitions. Word has length 34 [2021-07-13 20:18:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:38,167 INFO L482 AbstractCegarLoop]: Abstraction has 8750 states and 35545 transitions. [2021-07-13 20:18:38,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 35545 transitions. [2021-07-13 20:18:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:38,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:38,185 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:38,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:38,393 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:38,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1500154431, now seen corresponding path program 8 times [2021-07-13 20:18:38,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:38,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813806953] [2021-07-13 20:18:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:38,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:38,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813806953] [2021-07-13 20:18:38,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813806953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:38,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014789316] [2021-07-13 20:18:38,495 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:38,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:38,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:18:38,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:38,699 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:38,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-07-13 20:18:38,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:38,709 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-07-13 20:18:38,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:38,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-13 20:18:38,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:18:38,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:38,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:38,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:38,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-07-13 20:18:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:38,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014789316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:38,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:38,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:18:38,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183138719] [2021-07-13 20:18:38,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:18:38,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:38,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:18:38,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:38,778 INFO L87 Difference]: Start difference. First operand 8750 states and 35545 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:39,565 INFO L93 Difference]: Finished difference Result 24924 states and 99773 transitions. [2021-07-13 20:18:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:18:39,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:39,661 INFO L225 Difference]: With dead ends: 24924 [2021-07-13 20:18:39,661 INFO L226 Difference]: Without dead ends: 24849 [2021-07-13 20:18:39,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:18:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24849 states. [2021-07-13 20:18:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24849 to 10107. [2021-07-13 20:18:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10107 states, 10106 states have (on average 4.0783692855729266) internal successors, (41216), 10106 states have internal predecessors, (41216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 41216 transitions. [2021-07-13 20:18:40,064 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 41216 transitions. Word has length 34 [2021-07-13 20:18:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:40,064 INFO L482 AbstractCegarLoop]: Abstraction has 10107 states and 41216 transitions. [2021-07-13 20:18:40,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 41216 transitions. [2021-07-13 20:18:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:40,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:40,083 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:40,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:18:40,284 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:40,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash 834191513, now seen corresponding path program 9 times [2021-07-13 20:18:40,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:40,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845466587] [2021-07-13 20:18:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:40,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:40,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845466587] [2021-07-13 20:18:40,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845466587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:40,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486923688] [2021-07-13 20:18:40,371 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 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 20:18:40,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:18:40,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:40,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:18:40,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:40,557 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 32 treesize of output 26 [2021-07-13 20:18:40,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:40,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:40,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:40,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-07-13 20:18:40,601 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:18:40,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:18:40,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:40,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:40,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:40,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-07-13 20:18:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:40,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486923688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:40,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:40,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:18:40,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49945661] [2021-07-13 20:18:40,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:18:40,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:40,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:18:40,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:40,734 INFO L87 Difference]: Start difference. First operand 10107 states and 41216 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:41,283 INFO L93 Difference]: Finished difference Result 23710 states and 94971 transitions. [2021-07-13 20:18:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:18:41,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:41,355 INFO L225 Difference]: With dead ends: 23710 [2021-07-13 20:18:41,355 INFO L226 Difference]: Without dead ends: 23595 [2021-07-13 20:18:41,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:18:41,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23595 states. [2021-07-13 20:18:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23595 to 9723. [2021-07-13 20:18:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9723 states, 9722 states have (on average 4.074675992594116) internal successors, (39614), 9722 states have internal predecessors, (39614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9723 states to 9723 states and 39614 transitions. [2021-07-13 20:18:41,718 INFO L78 Accepts]: Start accepts. Automaton has 9723 states and 39614 transitions. Word has length 34 [2021-07-13 20:18:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:41,718 INFO L482 AbstractCegarLoop]: Abstraction has 9723 states and 39614 transitions. [2021-07-13 20:18:41,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 9723 states and 39614 transitions. [2021-07-13 20:18:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:41,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:41,736 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:41,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:41,937 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1500178855, now seen corresponding path program 10 times [2021-07-13 20:18:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:41,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720673867] [2021-07-13 20:18:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:42,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:42,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720673867] [2021-07-13 20:18:42,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720673867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:42,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895013959] [2021-07-13 20:18:42,022 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:42,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:42,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:42,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:18:42,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:42,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-13 20:18:42,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:42,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:42,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:42,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-07-13 20:18:42,230 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:42,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:18:42,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:42,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:42,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:42,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:18:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:42,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895013959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:42,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:42,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:18:42,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353736724] [2021-07-13 20:18:42,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:18:42,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:42,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:18:42,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:42,256 INFO L87 Difference]: Start difference. First operand 9723 states and 39614 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:42,910 INFO L93 Difference]: Finished difference Result 22988 states and 91824 transitions. [2021-07-13 20:18:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:18:42,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:42,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:42,988 INFO L225 Difference]: With dead ends: 22988 [2021-07-13 20:18:42,989 INFO L226 Difference]: Without dead ends: 22753 [2021-07-13 20:18:42,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:18:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22753 states. [2021-07-13 20:18:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22753 to 9831. [2021-07-13 20:18:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9831 states, 9830 states have (on average 4.077110885045778) internal successors, (40078), 9830 states have internal predecessors, (40078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9831 states to 9831 states and 40078 transitions. [2021-07-13 20:18:43,416 INFO L78 Accepts]: Start accepts. Automaton has 9831 states and 40078 transitions. Word has length 34 [2021-07-13 20:18:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:43,417 INFO L482 AbstractCegarLoop]: Abstraction has 9831 states and 40078 transitions. [2021-07-13 20:18:43,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 9831 states and 40078 transitions. [2021-07-13 20:18:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:43,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:43,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:43,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:18:43,664 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:43,664 INFO L82 PathProgramCache]: Analyzing trace with hash -573433369, now seen corresponding path program 11 times [2021-07-13 20:18:43,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:43,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489083841] [2021-07-13 20:18:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:43,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489083841] [2021-07-13 20:18:43,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489083841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:43,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212865532] [2021-07-13 20:18:43,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:43,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:18:43,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:43,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:18:43,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:43,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:43,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:43,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:43,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:43,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 58 [2021-07-13 20:18:44,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:18:44,037 INFO L628 ElimStorePlain]: treesize reduction 22, result has 56.9 percent of original size [2021-07-13 20:18:44,045 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 20:18:44,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:28 [2021-07-13 20:18:44,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:18:44,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:44,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:44,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:44,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-07-13 20:18:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:44,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212865532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:44,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:44,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:18:44,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820140250] [2021-07-13 20:18:44,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:18:44,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:18:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:44,137 INFO L87 Difference]: Start difference. First operand 9831 states and 40078 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:45,586 INFO L93 Difference]: Finished difference Result 26430 states and 105005 transitions. [2021-07-13 20:18:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:18:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:45,674 INFO L225 Difference]: With dead ends: 26430 [2021-07-13 20:18:45,674 INFO L226 Difference]: Without dead ends: 26355 [2021-07-13 20:18:45,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 974.4ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26355 states. [2021-07-13 20:18:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26355 to 10895. [2021-07-13 20:18:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10895 states, 10894 states have (on average 4.096016155682027) internal successors, (44622), 10894 states have internal predecessors, (44622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10895 states to 10895 states and 44622 transitions. [2021-07-13 20:18:46,087 INFO L78 Accepts]: Start accepts. Automaton has 10895 states and 44622 transitions. Word has length 34 [2021-07-13 20:18:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:46,087 INFO L482 AbstractCegarLoop]: Abstraction has 10895 states and 44622 transitions. [2021-07-13 20:18:46,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 10895 states and 44622 transitions. [2021-07-13 20:18:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:46,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:46,109 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:46,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:46,319 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash -316777907, now seen corresponding path program 12 times [2021-07-13 20:18:46,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:46,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694017095] [2021-07-13 20:18:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:46,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:46,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694017095] [2021-07-13 20:18:46,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694017095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:46,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928579107] [2021-07-13 20:18:46,427 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:46,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:18:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:18:46,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:46,750 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 28 treesize of output 22 [2021-07-13 20:18:46,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:46,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:46,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:18:46,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:36 [2021-07-13 20:18:46,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:46,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:46,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 20:18:46,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:18:46,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:46,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:18:46,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:13 [2021-07-13 20:18:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:46,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928579107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:46,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:46,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:18:46,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920705143] [2021-07-13 20:18:46,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:18:46,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:46,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:18:46,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:46,899 INFO L87 Difference]: Start difference. First operand 10895 states and 44622 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:47,781 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-07-13 20:18:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:48,235 INFO L93 Difference]: Finished difference Result 28412 states and 113321 transitions. [2021-07-13 20:18:48,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:18:48,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:48,352 INFO L225 Difference]: With dead ends: 28412 [2021-07-13 20:18:48,352 INFO L226 Difference]: Without dead ends: 28297 [2021-07-13 20:18:48,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:18:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28297 states. [2021-07-13 20:18:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28297 to 10659. [2021-07-13 20:18:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10659 states, 10658 states have (on average 4.094952148620754) internal successors, (43644), 10658 states have internal predecessors, (43644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 43644 transitions. [2021-07-13 20:18:48,927 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 43644 transitions. Word has length 34 [2021-07-13 20:18:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:48,927 INFO L482 AbstractCegarLoop]: Abstraction has 10659 states and 43644 transitions. [2021-07-13 20:18:48,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:48,927 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 43644 transitions. [2021-07-13 20:18:48,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:48,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:48,952 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:49,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:18:49,165 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1202868029, now seen corresponding path program 13 times [2021-07-13 20:18:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:49,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128563971] [2021-07-13 20:18:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:49,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:49,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128563971] [2021-07-13 20:18:49,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128563971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:49,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354664886] [2021-07-13 20:18:49,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:49,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:18:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:49,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-13 20:18:49,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:49,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:49,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:49,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-07-13 20:18:49,490 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:49,490 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:18:49,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:49,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:49,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:49,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:18:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:49,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354664886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:49,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:49,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:18:49,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019978089] [2021-07-13 20:18:49,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:18:49,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:49,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:18:49,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:49,533 INFO L87 Difference]: Start difference. First operand 10659 states and 43644 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:49,943 INFO L93 Difference]: Finished difference Result 19194 states and 76806 transitions. [2021-07-13 20:18:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:18:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:50,026 INFO L225 Difference]: With dead ends: 19194 [2021-07-13 20:18:50,026 INFO L226 Difference]: Without dead ends: 19079 [2021-07-13 20:18:50,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:18:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19079 states. [2021-07-13 20:18:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19079 to 10744. [2021-07-13 20:18:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10744 states, 10743 states have (on average 4.095783300753979) internal successors, (44001), 10743 states have internal predecessors, (44001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10744 states to 10744 states and 44001 transitions. [2021-07-13 20:18:50,607 INFO L78 Accepts]: Start accepts. Automaton has 10744 states and 44001 transitions. Word has length 34 [2021-07-13 20:18:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:50,607 INFO L482 AbstractCegarLoop]: Abstraction has 10744 states and 44001 transitions. [2021-07-13 20:18:50,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 10744 states and 44001 transitions. [2021-07-13 20:18:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:50,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:50,628 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:50,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:18:50,830 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash 431927787, now seen corresponding path program 14 times [2021-07-13 20:18:50,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:50,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165007506] [2021-07-13 20:18:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,973 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-13 20:18:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:51,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:51,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165007506] [2021-07-13 20:18:51,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165007506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:51,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226897352] [2021-07-13 20:18:51,036 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:51,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:51,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:51,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:18:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:51,215 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:51,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-07-13 20:18:51,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:51,224 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-07-13 20:18:51,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:51,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-13 20:18:51,261 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 15 treesize of output 11 [2021-07-13 20:18:51,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:51,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:51,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:51,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-07-13 20:18:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:51,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226897352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:51,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:51,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:18:51,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308592924] [2021-07-13 20:18:51,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:18:51,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:18:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:51,285 INFO L87 Difference]: Start difference. First operand 10744 states and 44001 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:52,372 INFO L93 Difference]: Finished difference Result 24998 states and 100164 transitions. [2021-07-13 20:18:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:18:52,372 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:52,459 INFO L225 Difference]: With dead ends: 24998 [2021-07-13 20:18:52,459 INFO L226 Difference]: Without dead ends: 24923 [2021-07-13 20:18:52,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 684.4ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:18:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24923 states. [2021-07-13 20:18:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24923 to 11500. [2021-07-13 20:18:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11500 states, 11499 states have (on average 4.106009218192886) internal successors, (47215), 11499 states have internal predecessors, (47215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11500 states to 11500 states and 47215 transitions. [2021-07-13 20:18:52,896 INFO L78 Accepts]: Start accepts. Automaton has 11500 states and 47215 transitions. Word has length 34 [2021-07-13 20:18:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:52,896 INFO L482 AbstractCegarLoop]: Abstraction has 11500 states and 47215 transitions. [2021-07-13 20:18:52,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 11500 states and 47215 transitions. [2021-07-13 20:18:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:52,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:52,919 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:53,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:18:53,120 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:53,120 INFO L82 PathProgramCache]: Analyzing trace with hash 688583249, now seen corresponding path program 15 times [2021-07-13 20:18:53,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:53,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548903665] [2021-07-13 20:18:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:53,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548903665] [2021-07-13 20:18:53,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548903665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19785862] [2021-07-13 20:18:53,218 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:53,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:18:53,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:18:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:53,416 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 34 treesize of output 28 [2021-07-13 20:18:53,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:53,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:53,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:53,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:31 [2021-07-13 20:18:53,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:53,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:53,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-07-13 20:18:53,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:18:53,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:53,491 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 20:18:53,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-07-13 20:18:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19785862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:53,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:18:53,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356018654] [2021-07-13 20:18:53,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:18:53,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:18:53,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:53,547 INFO L87 Difference]: Start difference. First operand 11500 states and 47215 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:55,025 INFO L93 Difference]: Finished difference Result 23541 states and 94127 transitions. [2021-07-13 20:18:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:18:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:55,095 INFO L225 Difference]: With dead ends: 23541 [2021-07-13 20:18:55,096 INFO L226 Difference]: Without dead ends: 23426 [2021-07-13 20:18:55,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 788.2ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:18:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23426 states. [2021-07-13 20:18:55,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23426 to 11260. [2021-07-13 20:18:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11260 states, 11259 states have (on average 4.104893862687628) internal successors, (46217), 11259 states have internal predecessors, (46217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11260 states to 11260 states and 46217 transitions. [2021-07-13 20:18:55,397 INFO L78 Accepts]: Start accepts. Automaton has 11260 states and 46217 transitions. Word has length 34 [2021-07-13 20:18:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:55,397 INFO L482 AbstractCegarLoop]: Abstraction has 11260 states and 46217 transitions. [2021-07-13 20:18:55,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 11260 states and 46217 transitions. [2021-07-13 20:18:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:55,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:55,419 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:55,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:18:55,620 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2086738111, now seen corresponding path program 16 times [2021-07-13 20:18:55,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:55,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775724844] [2021-07-13 20:18:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:55,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:55,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775724844] [2021-07-13 20:18:55,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775724844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:55,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315465213] [2021-07-13 20:18:55,725 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:55,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:55,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:18:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:55,996 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 19 treesize of output 15 [2021-07-13 20:18:55,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:56,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:56,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:56,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-07-13 20:18:56,050 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:56,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:18:56,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:56,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:56,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:56,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:18:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:56,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315465213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:56,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:56,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:18:56,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842748841] [2021-07-13 20:18:56,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:18:56,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:56,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:18:56,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:56,076 INFO L87 Difference]: Start difference. First operand 11260 states and 46217 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:56,812 INFO L93 Difference]: Finished difference Result 22298 states and 89003 transitions. [2021-07-13 20:18:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:18:56,813 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:56,877 INFO L225 Difference]: With dead ends: 22298 [2021-07-13 20:18:56,878 INFO L226 Difference]: Without dead ends: 22143 [2021-07-13 20:18:56,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:18:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22143 states. [2021-07-13 20:18:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22143 to 12043. [2021-07-13 20:18:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12043 states, 12042 states have (on average 4.112855007473842) internal successors, (49527), 12042 states have internal predecessors, (49527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12043 states to 12043 states and 49527 transitions. [2021-07-13 20:18:57,169 INFO L78 Accepts]: Start accepts. Automaton has 12043 states and 49527 transitions. Word has length 34 [2021-07-13 20:18:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:57,169 INFO L482 AbstractCegarLoop]: Abstraction has 12043 states and 49527 transitions. [2021-07-13 20:18:57,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 12043 states and 49527 transitions. [2021-07-13 20:18:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:57,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:57,199 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:57,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:18:57,409 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:57,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1516120409, now seen corresponding path program 17 times [2021-07-13 20:18:57,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:57,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642497024] [2021-07-13 20:18:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:57,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:57,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642497024] [2021-07-13 20:18:57,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642497024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:57,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801203053] [2021-07-13 20:18:57,558 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:57,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:18:57,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:57,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:18:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:57,762 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:18:57,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-07-13 20:18:57,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:18:57,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:57,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:18:57,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:30 [2021-07-13 20:18:57,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-13 20:18:57,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:57,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:57,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:57,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:18:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:57,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801203053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:57,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:57,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:18:57,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882342821] [2021-07-13 20:18:57,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:18:57,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:57,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:18:57,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:57,882 INFO L87 Difference]: Start difference. First operand 12043 states and 49527 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:59,030 INFO L93 Difference]: Finished difference Result 36456 states and 147208 transitions. [2021-07-13 20:18:59,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:18:59,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:18:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:59,177 INFO L225 Difference]: With dead ends: 36456 [2021-07-13 20:18:59,177 INFO L226 Difference]: Without dead ends: 36381 [2021-07-13 20:18:59,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:18:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36381 states. [2021-07-13 20:18:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36381 to 13600. [2021-07-13 20:18:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13600 states, 13599 states have (on average 4.1242003088462384) internal successors, (56085), 13599 states have internal predecessors, (56085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13600 states to 13600 states and 56085 transitions. [2021-07-13 20:18:59,729 INFO L78 Accepts]: Start accepts. Automaton has 13600 states and 56085 transitions. Word has length 34 [2021-07-13 20:18:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:59,729 INFO L482 AbstractCegarLoop]: Abstraction has 13600 states and 56085 transitions. [2021-07-13 20:18:59,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 13600 states and 56085 transitions. [2021-07-13 20:18:59,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:18:59,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:59,757 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:59,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:59,958 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:59,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1259464947, now seen corresponding path program 18 times [2021-07-13 20:18:59,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:59,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011897900] [2021-07-13 20:18:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011897900] [2021-07-13 20:19:00,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011897900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000232251] [2021-07-13 20:19:00,034 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:00,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:19:00,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:00,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:19:00,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:00,190 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 34 treesize of output 28 [2021-07-13 20:19:00,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:00,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:00,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:00,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:31 [2021-07-13 20:19:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:00,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:00,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-07-13 20:19:00,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:19:00,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:00,270 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 20:19:00,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-07-13 20:19:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000232251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:00,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:19:00,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182606645] [2021-07-13 20:19:00,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:00,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:00,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:00,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:00,313 INFO L87 Difference]: Start difference. First operand 13600 states and 56085 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:01,488 INFO L93 Difference]: Finished difference Result 26172 states and 105952 transitions. [2021-07-13 20:19:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:19:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:01,699 INFO L225 Difference]: With dead ends: 26172 [2021-07-13 20:19:01,699 INFO L226 Difference]: Without dead ends: 26057 [2021-07-13 20:19:01,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:19:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-07-13 20:19:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 13750. [2021-07-13 20:19:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13750 states, 13749 states have (on average 4.126918321332461) internal successors, (56741), 13749 states have internal predecessors, (56741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13750 states to 13750 states and 56741 transitions. [2021-07-13 20:19:02,047 INFO L78 Accepts]: Start accepts. Automaton has 13750 states and 56741 transitions. Word has length 34 [2021-07-13 20:19:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:02,047 INFO L482 AbstractCegarLoop]: Abstraction has 13750 states and 56741 transitions. [2021-07-13 20:19:02,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13750 states and 56741 transitions. [2021-07-13 20:19:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:02,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:02,075 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:02,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 20:19:02,276 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash -756448751, now seen corresponding path program 19 times [2021-07-13 20:19:02,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:02,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111369929] [2021-07-13 20:19:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:02,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:02,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111369929] [2021-07-13 20:19:02,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111369929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:02,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601277302] [2021-07-13 20:19:02,352 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:02,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:02,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:02,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-13 20:19:02,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:02,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:02,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:02,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-07-13 20:19:02,684 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:19:02,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:19:02,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:02,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:02,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:02,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:19:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:02,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601277302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:02,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:02,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:02,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206038927] [2021-07-13 20:19:02,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:02,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:02,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:02,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:02,713 INFO L87 Difference]: Start difference. First operand 13750 states and 56741 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:03,554 INFO L93 Difference]: Finished difference Result 28454 states and 114913 transitions. [2021-07-13 20:19:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:19:03,554 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:03,669 INFO L225 Difference]: With dead ends: 28454 [2021-07-13 20:19:03,669 INFO L226 Difference]: Without dead ends: 28219 [2021-07-13 20:19:03,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28219 states. [2021-07-13 20:19:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28219 to 12943. [2021-07-13 20:19:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12943 states, 12942 states have (on average 4.129346314325452) internal successors, (53442), 12942 states have internal predecessors, (53442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12943 states to 12943 states and 53442 transitions. [2021-07-13 20:19:04,252 INFO L78 Accepts]: Start accepts. Automaton has 12943 states and 53442 transitions. Word has length 34 [2021-07-13 20:19:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:04,252 INFO L482 AbstractCegarLoop]: Abstraction has 12943 states and 53442 transitions. [2021-07-13 20:19:04,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 12943 states and 53442 transitions. [2021-07-13 20:19:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:04,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:04,280 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:04,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:04,481 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:04,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1335361853, now seen corresponding path program 20 times [2021-07-13 20:19:04,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:04,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435275710] [2021-07-13 20:19:04,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:04,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:04,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435275710] [2021-07-13 20:19:04,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435275710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:04,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496245196] [2021-07-13 20:19:04,583 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:04,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:04,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 20:19:04,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:04,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:04,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:04,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:19:04,782 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:19:04,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:19:04,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:04,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:04,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:04,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:19:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:04,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496245196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:04,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:04,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:04,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123526390] [2021-07-13 20:19:04,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:04,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:04,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:04,811 INFO L87 Difference]: Start difference. First operand 12943 states and 53442 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:05,556 INFO L93 Difference]: Finished difference Result 23438 states and 94591 transitions. [2021-07-13 20:19:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:19:05,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:05,629 INFO L225 Difference]: With dead ends: 23438 [2021-07-13 20:19:05,629 INFO L226 Difference]: Without dead ends: 23283 [2021-07-13 20:19:05,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:19:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23283 states. [2021-07-13 20:19:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23283 to 13180. [2021-07-13 20:19:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13180 states, 13179 states have (on average 4.129524243114045) internal successors, (54423), 13179 states have internal predecessors, (54423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13180 states to 13180 states and 54423 transitions. [2021-07-13 20:19:06,107 INFO L78 Accepts]: Start accepts. Automaton has 13180 states and 54423 transitions. Word has length 34 [2021-07-13 20:19:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:06,107 INFO L482 AbstractCegarLoop]: Abstraction has 13180 states and 54423 transitions. [2021-07-13 20:19:06,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 13180 states and 54423 transitions. [2021-07-13 20:19:06,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:06,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:06,138 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:06,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-07-13 20:19:06,341 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash 53048833, now seen corresponding path program 21 times [2021-07-13 20:19:06,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:06,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107267109] [2021-07-13 20:19:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:06,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107267109] [2021-07-13 20:19:06,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107267109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107030220] [2021-07-13 20:19:06,417 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:06,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:19:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:19:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:06,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 20:19:06,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:06,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:06,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-07-13 20:19:06,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:06,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-07-13 20:19:06,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:19:06,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,669 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 20:19:06,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-07-13 20:19:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107030220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:06,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:19:06,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464074574] [2021-07-13 20:19:06,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:06,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:06,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:06,712 INFO L87 Difference]: Start difference. First operand 13180 states and 54423 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:07,622 INFO L93 Difference]: Finished difference Result 27881 states and 112706 transitions. [2021-07-13 20:19:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:19:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:07,717 INFO L225 Difference]: With dead ends: 27881 [2021-07-13 20:19:07,717 INFO L226 Difference]: Without dead ends: 27646 [2021-07-13 20:19:07,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:19:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27646 states. [2021-07-13 20:19:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27646 to 13288. [2021-07-13 20:19:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13288 states, 13287 states have (on average 4.130879807330474) internal successors, (54887), 13287 states have internal predecessors, (54887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13288 states to 13288 states and 54887 transitions. [2021-07-13 20:19:08,221 INFO L78 Accepts]: Start accepts. Automaton has 13288 states and 54887 transitions. Word has length 34 [2021-07-13 20:19:08,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:08,221 INFO L482 AbstractCegarLoop]: Abstraction has 13288 states and 54887 transitions. [2021-07-13 20:19:08,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 13288 states and 54887 transitions. [2021-07-13 20:19:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:08,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:08,252 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:08,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:08,453 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1169034441, now seen corresponding path program 22 times [2021-07-13 20:19:08,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:08,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018040610] [2021-07-13 20:19:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:08,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018040610] [2021-07-13 20:19:08,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018040610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42879041] [2021-07-13 20:19:08,550 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:08,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:08,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:08,712 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:19:08,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-07-13 20:19:08,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:08,720 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-07-13 20:19:08,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:08,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-13 20:19:08,759 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 15 treesize of output 11 [2021-07-13 20:19:08,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:08,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:08,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:08,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-07-13 20:19:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42879041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:08,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:08,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039213880] [2021-07-13 20:19:08,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:08,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:08,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:08,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:08,782 INFO L87 Difference]: Start difference. First operand 13288 states and 54887 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:09,426 INFO L93 Difference]: Finished difference Result 20392 states and 83172 transitions. [2021-07-13 20:19:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:09,488 INFO L225 Difference]: With dead ends: 20392 [2021-07-13 20:19:09,489 INFO L226 Difference]: Without dead ends: 20317 [2021-07-13 20:19:09,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20317 states. [2021-07-13 20:19:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20317 to 13899. [2021-07-13 20:19:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13899 states, 13898 states have (on average 4.1316736221039) internal successors, (57422), 13898 states have internal predecessors, (57422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13899 states to 13899 states and 57422 transitions. [2021-07-13 20:19:09,909 INFO L78 Accepts]: Start accepts. Automaton has 13899 states and 57422 transitions. Word has length 34 [2021-07-13 20:19:09,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:09,909 INFO L482 AbstractCegarLoop]: Abstraction has 13899 states and 57422 transitions. [2021-07-13 20:19:09,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 13899 states and 57422 transitions. [2021-07-13 20:19:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:09,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:09,937 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:10,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:10,138 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:10,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:10,139 INFO L82 PathProgramCache]: Analyzing trace with hash -912378979, now seen corresponding path program 23 times [2021-07-13 20:19:10,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:10,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169532413] [2021-07-13 20:19:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:10,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:10,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169532413] [2021-07-13 20:19:10,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169532413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:10,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297602873] [2021-07-13 20:19:10,228 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:10,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:19:10,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:10,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:10,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:10,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-13 20:19:10,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:10,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:10,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:10,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:38 [2021-07-13 20:19:10,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:10,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:10,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 20:19:10,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:19:10,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:10,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:19:10,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:11 [2021-07-13 20:19:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:10,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297602873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:10,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:10,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:19:10,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819434474] [2021-07-13 20:19:10,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:10,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:10,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:10,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:10,634 INFO L87 Difference]: Start difference. First operand 13899 states and 57422 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:10,891 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-07-13 20:19:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:11,462 INFO L93 Difference]: Finished difference Result 29230 states and 119098 transitions. [2021-07-13 20:19:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:19:11,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:11,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:11,563 INFO L225 Difference]: With dead ends: 29230 [2021-07-13 20:19:11,563 INFO L226 Difference]: Without dead ends: 29115 [2021-07-13 20:19:11,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 514.5ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:19:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29115 states. [2021-07-13 20:19:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29115 to 13767. [2021-07-13 20:19:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13767 states, 13766 states have (on average 4.136713642307133) internal successors, (56946), 13766 states have internal predecessors, (56946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13767 states to 13767 states and 56946 transitions. [2021-07-13 20:19:12,116 INFO L78 Accepts]: Start accepts. Automaton has 13767 states and 56946 transitions. Word has length 34 [2021-07-13 20:19:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:12,116 INFO L482 AbstractCegarLoop]: Abstraction has 13767 states and 56946 transitions. [2021-07-13 20:19:12,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:12,116 INFO L276 IsEmpty]: Start isEmpty. Operand 13767 states and 56946 transitions. [2021-07-13 20:19:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:12,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:12,147 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:12,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:12,348 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:12,348 INFO L82 PathProgramCache]: Analyzing trace with hash 607266957, now seen corresponding path program 24 times [2021-07-13 20:19:12,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:12,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973951627] [2021-07-13 20:19:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:12,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:12,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973951627] [2021-07-13 20:19:12,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973951627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:12,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530236117] [2021-07-13 20:19:12,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:12,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:12,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:12,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:12,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:12,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-13 20:19:12,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:12,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-07-13 20:19:12,663 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:19:12,663 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:19:12,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:12,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:19:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:12,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530236117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:12,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:12,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:12,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470549978] [2021-07-13 20:19:12,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:12,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:12,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:12,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:12,694 INFO L87 Difference]: Start difference. First operand 13767 states and 56946 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,133 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-07-13 20:19:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:13,295 INFO L93 Difference]: Finished difference Result 24762 states and 100856 transitions. [2021-07-13 20:19:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:13,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:13,376 INFO L225 Difference]: With dead ends: 24762 [2021-07-13 20:19:13,376 INFO L226 Difference]: Without dead ends: 24647 [2021-07-13 20:19:13,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 419.9ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24647 states. [2021-07-13 20:19:13,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24647 to 13308. [2021-07-13 20:19:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13308 states, 13307 states have (on average 4.129631021267002) internal successors, (54953), 13307 states have internal predecessors, (54953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13308 states to 13308 states and 54953 transitions. [2021-07-13 20:19:13,921 INFO L78 Accepts]: Start accepts. Automaton has 13308 states and 54953 transitions. Word has length 34 [2021-07-13 20:19:13,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:13,921 INFO L482 AbstractCegarLoop]: Abstraction has 13308 states and 54953 transitions. [2021-07-13 20:19:13,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 13308 states and 54953 transitions. [2021-07-13 20:19:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:13,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:13,947 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:14,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:19:14,148 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash -546754701, now seen corresponding path program 25 times [2021-07-13 20:19:14,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:14,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417093646] [2021-07-13 20:19:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:14,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:14,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417093646] [2021-07-13 20:19:14,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417093646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996918553] [2021-07-13 20:19:14,220 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:14,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:14,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:14,387 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:19:14,387 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-07-13 20:19:14,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:14,395 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-07-13 20:19:14,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:14,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-13 20:19:14,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:19:14,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:14,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:14,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:14,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-07-13 20:19:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:14,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996918553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:14,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:14,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036896884] [2021-07-13 20:19:14,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:14,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:14,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:14,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:14,449 INFO L87 Difference]: Start difference. First operand 13308 states and 54953 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:15,569 INFO L93 Difference]: Finished difference Result 30843 states and 125658 transitions. [2021-07-13 20:19:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:19:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:15,672 INFO L225 Difference]: With dead ends: 30843 [2021-07-13 20:19:15,673 INFO L226 Difference]: Without dead ends: 30768 [2021-07-13 20:19:15,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:19:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30768 states. [2021-07-13 20:19:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30768 to 14991. [2021-07-13 20:19:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 14990 states have (on average 4.145030020013342) internal successors, (62134), 14990 states have internal predecessors, (62134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 62134 transitions. [2021-07-13 20:19:16,271 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 62134 transitions. Word has length 34 [2021-07-13 20:19:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:16,272 INFO L482 AbstractCegarLoop]: Abstraction has 14991 states and 62134 transitions. [2021-07-13 20:19:16,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 62134 transitions. [2021-07-13 20:19:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:16,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:16,309 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:16,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:16,511 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash -290099239, now seen corresponding path program 26 times [2021-07-13 20:19:16,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:16,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696886930] [2021-07-13 20:19:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:16,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696886930] [2021-07-13 20:19:16,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696886930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497513442] [2021-07-13 20:19:16,593 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:16,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:16,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:16,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:16,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:16,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:19:16,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:16,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:16,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:16,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-07-13 20:19:16,832 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:19:16,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:19:16,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:16,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:16,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:16,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:19:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497513442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:16,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:16,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856242140] [2021-07-13 20:19:16,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:16,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:16,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:16,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:16,862 INFO L87 Difference]: Start difference. First operand 14991 states and 62134 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:17,150 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-07-13 20:19:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:17,666 INFO L93 Difference]: Finished difference Result 28364 states and 115770 transitions. [2021-07-13 20:19:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:17,760 INFO L225 Difference]: With dead ends: 28364 [2021-07-13 20:19:17,760 INFO L226 Difference]: Without dead ends: 28249 [2021-07-13 20:19:17,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28249 states. [2021-07-13 20:19:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28249 to 14487. [2021-07-13 20:19:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14487 states, 14486 states have (on average 4.141930139444981) internal successors, (60000), 14486 states have internal predecessors, (60000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14487 states to 14487 states and 60000 transitions. [2021-07-13 20:19:18,300 INFO L78 Accepts]: Start accepts. Automaton has 14487 states and 60000 transitions. Word has length 34 [2021-07-13 20:19:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:18,300 INFO L482 AbstractCegarLoop]: Abstraction has 14487 states and 60000 transitions. [2021-07-13 20:19:18,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 14487 states and 60000 transitions. [2021-07-13 20:19:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:18,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:18,331 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:18,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 20:19:18,532 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash 212916957, now seen corresponding path program 27 times [2021-07-13 20:19:18,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:18,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242675667] [2021-07-13 20:19:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:18,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:18,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242675667] [2021-07-13 20:19:18,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242675667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:18,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427428537] [2021-07-13 20:19:18,628 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:18,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:19:18,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:18,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:19:18,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:18,934 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-13 20:19:18,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-13 20:19:18,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:18,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:18,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:18,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-07-13 20:19:19,010 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:19:19,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:19:19,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:19,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:19,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:19,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-07-13 20:19:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:19,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427428537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:19,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:19,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:19,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440835498] [2021-07-13 20:19:19,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:19,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:19,039 INFO L87 Difference]: Start difference. First operand 14487 states and 60000 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:19,656 INFO L93 Difference]: Finished difference Result 30736 states and 125294 transitions. [2021-07-13 20:19:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:19:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:19,757 INFO L225 Difference]: With dead ends: 30736 [2021-07-13 20:19:19,757 INFO L226 Difference]: Without dead ends: 30501 [2021-07-13 20:19:19,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30501 states. [2021-07-13 20:19:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30501 to 13662. [2021-07-13 20:19:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13662 states, 13661 states have (on average 4.144498938584291) internal successors, (56618), 13661 states have internal predecessors, (56618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 56618 transitions. [2021-07-13 20:19:20,349 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 56618 transitions. Word has length 34 [2021-07-13 20:19:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:20,349 INFO L482 AbstractCegarLoop]: Abstraction has 13662 states and 56618 transitions. [2021-07-13 20:19:20,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 56618 transitions. [2021-07-13 20:19:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:20,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:20,379 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:20,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 20:19:20,580 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:20,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1990239735, now seen corresponding path program 28 times [2021-07-13 20:19:20,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:20,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984798098] [2021-07-13 20:19:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:20,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:20,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984798098] [2021-07-13 20:19:20,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984798098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:20,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630640870] [2021-07-13 20:19:20,759 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:20,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:20,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:20,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:20,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:20,876 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 20:19:20,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:20,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:20,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:20,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:19:20,951 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:19:20,951 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:19:20,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:20,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:20,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:20,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:19:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:20,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630640870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:20,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:20,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:20,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804283463] [2021-07-13 20:19:20,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:20,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:20,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:20,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:20,981 INFO L87 Difference]: Start difference. First operand 13662 states and 56618 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:21,667 INFO L93 Difference]: Finished difference Result 24729 states and 99644 transitions. [2021-07-13 20:19:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:19:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:21,745 INFO L225 Difference]: With dead ends: 24729 [2021-07-13 20:19:21,745 INFO L226 Difference]: Without dead ends: 24574 [2021-07-13 20:19:21,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 525.8ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24574 states. [2021-07-13 20:19:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24574 to 13674. [2021-07-13 20:19:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13674 states, 13673 states have (on average 4.145103488627221) internal successors, (56676), 13673 states have internal predecessors, (56676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13674 states to 13674 states and 56676 transitions. [2021-07-13 20:19:22,170 INFO L78 Accepts]: Start accepts. Automaton has 13674 states and 56676 transitions. Word has length 34 [2021-07-13 20:19:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:22,171 INFO L482 AbstractCegarLoop]: Abstraction has 13674 states and 56676 transitions. [2021-07-13 20:19:22,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 13674 states and 56676 transitions. [2021-07-13 20:19:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:22,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:22,198 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:22,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 20:19:22,399 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:22,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1022414541, now seen corresponding path program 29 times [2021-07-13 20:19:22,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:22,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301099237] [2021-07-13 20:19:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:22,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:22,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301099237] [2021-07-13 20:19:22,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301099237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:22,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013643467] [2021-07-13 20:19:22,482 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:22,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:22,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:22,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:22,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:22,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 20:19:22,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:22,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:22,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:22,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-07-13 20:19:22,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:22,702 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 20:19:22,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:19:22,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:22,718 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 20:19:22,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2021-07-13 20:19:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:22,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013643467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:22,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:22,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:19:22,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448266718] [2021-07-13 20:19:22,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:22,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:22,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:22,771 INFO L87 Difference]: Start difference. First operand 13674 states and 56676 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:23,001 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-07-13 20:19:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:23,964 INFO L93 Difference]: Finished difference Result 37613 states and 152667 transitions. [2021-07-13 20:19:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:19:23,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:24,221 INFO L225 Difference]: With dead ends: 37613 [2021-07-13 20:19:24,222 INFO L226 Difference]: Without dead ends: 37323 [2021-07-13 20:19:24,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:19:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37323 states. [2021-07-13 20:19:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37323 to 14150. [2021-07-13 20:19:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14150 states, 14149 states have (on average 4.154003816524136) internal successors, (58775), 14149 states have internal predecessors, (58775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14150 states to 14150 states and 58775 transitions. [2021-07-13 20:19:24,697 INFO L78 Accepts]: Start accepts. Automaton has 14150 states and 58775 transitions. Word has length 34 [2021-07-13 20:19:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:24,697 INFO L482 AbstractCegarLoop]: Abstraction has 14150 states and 58775 transitions. [2021-07-13 20:19:24,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 14150 states and 58775 transitions. [2021-07-13 20:19:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:24,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:24,726 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:24,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-13 20:19:24,933 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1427456559, now seen corresponding path program 30 times [2021-07-13 20:19:24,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:24,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985613973] [2021-07-13 20:19:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:25,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985613973] [2021-07-13 20:19:25,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985613973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256903172] [2021-07-13 20:19:25,030 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:25,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:25,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:25,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:25,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 20:19:25,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:25,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:25,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:25,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-07-13 20:19:25,402 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:19:25,402 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:19:25,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:25,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:25,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:25,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:19:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:25,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256903172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:25,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66588887] [2021-07-13 20:19:25,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:25,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:25,437 INFO L87 Difference]: Start difference. First operand 14150 states and 58775 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:25,913 INFO L93 Difference]: Finished difference Result 22775 states and 92502 transitions. [2021-07-13 20:19:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:19:25,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:25,996 INFO L225 Difference]: With dead ends: 22775 [2021-07-13 20:19:25,996 INFO L226 Difference]: Without dead ends: 22620 [2021-07-13 20:19:25,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2021-07-13 20:19:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 14182. [2021-07-13 20:19:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14182 states, 14181 states have (on average 4.154502503349552) internal successors, (58915), 14181 states have internal predecessors, (58915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14182 states to 14182 states and 58915 transitions. [2021-07-13 20:19:26,451 INFO L78 Accepts]: Start accepts. Automaton has 14182 states and 58915 transitions. Word has length 34 [2021-07-13 20:19:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:26,451 INFO L482 AbstractCegarLoop]: Abstraction has 14182 states and 58915 transitions. [2021-07-13 20:19:26,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 14182 states and 58915 transitions. [2021-07-13 20:19:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:19:26,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:26,480 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:26,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:19:26,680 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:26,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:26,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1674195085, now seen corresponding path program 31 times [2021-07-13 20:19:26,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:26,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857301153] [2021-07-13 20:19:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:26,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:26,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857301153] [2021-07-13 20:19:26,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857301153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:26,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661041619] [2021-07-13 20:19:26,742 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:26,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:26,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:26,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 20:19:26,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:26,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:26,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:26,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-07-13 20:19:26,932 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:19:26,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:19:26,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:26,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:26,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:26,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:19:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:26,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661041619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:26,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:26,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:19:26,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743539727] [2021-07-13 20:19:26,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:26,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:26,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:26,966 INFO L87 Difference]: Start difference. First operand 14182 states and 58915 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:27,609 INFO L93 Difference]: Finished difference Result 27396 states and 111149 transitions. [2021-07-13 20:19:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:19:27,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:19:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:27,699 INFO L225 Difference]: With dead ends: 27396 [2021-07-13 20:19:27,699 INFO L226 Difference]: Without dead ends: 27241 [2021-07-13 20:19:27,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 327.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-07-13 20:19:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 14407. [2021-07-13 20:19:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14407 states, 14406 states have (on average 4.153685964181591) internal successors, (59838), 14406 states have internal predecessors, (59838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 59838 transitions. [2021-07-13 20:19:28,212 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 59838 transitions. Word has length 34 [2021-07-13 20:19:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:28,212 INFO L482 AbstractCegarLoop]: Abstraction has 14407 states and 59838 transitions. [2021-07-13 20:19:28,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 59838 transitions. [2021-07-13 20:19:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:28,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:28,241 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:28,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:19:28,442 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:28,442 INFO L82 PathProgramCache]: Analyzing trace with hash -140783524, now seen corresponding path program 6 times [2021-07-13 20:19:28,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:28,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497165601] [2021-07-13 20:19:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:28,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497165601] [2021-07-13 20:19:28,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497165601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055288768] [2021-07-13 20:19:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:28,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:19:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:28,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055288768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:28,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:28,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-07-13 20:19:28,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526190403] [2021-07-13 20:19:28,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:19:28,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:19:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:19:28,599 INFO L87 Difference]: Start difference. First operand 14407 states and 59838 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:28,773 INFO L93 Difference]: Finished difference Result 22943 states and 94680 transitions. [2021-07-13 20:19:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:28,844 INFO L225 Difference]: With dead ends: 22943 [2021-07-13 20:19:28,844 INFO L226 Difference]: Without dead ends: 22609 [2021-07-13 20:19:28,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:28,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22609 states. [2021-07-13 20:19:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22609 to 20569. [2021-07-13 20:19:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20569 states, 20568 states have (on average 4.176244651886425) internal successors, (85897), 20568 states have internal predecessors, (85897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20569 states to 20569 states and 85897 transitions. [2021-07-13 20:19:29,518 INFO L78 Accepts]: Start accepts. Automaton has 20569 states and 85897 transitions. Word has length 36 [2021-07-13 20:19:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:29,518 INFO L482 AbstractCegarLoop]: Abstraction has 20569 states and 85897 transitions. [2021-07-13 20:19:29,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20569 states and 85897 transitions. [2021-07-13 20:19:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:29,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:29,726 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:29,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:19:29,926 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:29,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1416997327, now seen corresponding path program 32 times [2021-07-13 20:19:29,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:29,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844333211] [2021-07-13 20:19:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:19:29,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:29,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844333211] [2021-07-13 20:19:29,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844333211] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:19:29,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:19:29,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:19:29,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816711407] [2021-07-13 20:19:29,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:19:29,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:29,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:19:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:19:29,946 INFO L87 Difference]: Start difference. First operand 20569 states and 85897 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:30,198 INFO L93 Difference]: Finished difference Result 37535 states and 156218 transitions. [2021-07-13 20:19:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:19:30,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 36 [2021-07-13 20:19:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:30,329 INFO L225 Difference]: With dead ends: 37535 [2021-07-13 20:19:30,330 INFO L226 Difference]: Without dead ends: 36829 [2021-07-13 20:19:30,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:19:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36829 states. [2021-07-13 20:19:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36829 to 33540. [2021-07-13 20:19:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33540 states, 33539 states have (on average 4.207489788007991) internal successors, (141115), 33539 states have internal predecessors, (141115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33540 states to 33540 states and 141115 transitions. [2021-07-13 20:19:31,338 INFO L78 Accepts]: Start accepts. Automaton has 33540 states and 141115 transitions. Word has length 36 [2021-07-13 20:19:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:31,338 INFO L482 AbstractCegarLoop]: Abstraction has 33540 states and 141115 transitions. [2021-07-13 20:19:31,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 33540 states and 141115 transitions. [2021-07-13 20:19:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:19:31,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:31,411 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:31,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-07-13 20:19:31,412 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash -656275528, now seen corresponding path program 7 times [2021-07-13 20:19:31,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:31,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948025644] [2021-07-13 20:19:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:31,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:31,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948025644] [2021-07-13 20:19:31,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948025644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:31,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032736289] [2021-07-13 20:19:31,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:31,793 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:19:31,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2021-07-13 20:19:31,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:31,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:31,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:31,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:3 [2021-07-13 20:19:32,020 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 20:19:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:32,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032736289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:32,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:32,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:19:32,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092582224] [2021-07-13 20:19:32,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:32,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:32,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:32,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:32,032 INFO L87 Difference]: Start difference. First operand 33540 states and 141115 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 20:19:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:33,526 INFO L93 Difference]: Finished difference Result 59772 states and 246214 transitions. [2021-07-13 20:19:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:19:33,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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) Word has length 39 [2021-07-13 20:19:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:33,758 INFO L225 Difference]: With dead ends: 59772 [2021-07-13 20:19:33,759 INFO L226 Difference]: Without dead ends: 58808 [2021-07-13 20:19:33,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:19:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58808 states. [2021-07-13 20:19:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58808 to 33468. [2021-07-13 20:19:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33468 states, 33467 states have (on average 4.193265007320644) internal successors, (140336), 33467 states have internal predecessors, (140336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33468 states to 33468 states and 140336 transitions. [2021-07-13 20:19:34,993 INFO L78 Accepts]: Start accepts. Automaton has 33468 states and 140336 transitions. Word has length 39 [2021-07-13 20:19:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:34,993 INFO L482 AbstractCegarLoop]: Abstraction has 33468 states and 140336 transitions. [2021-07-13 20:19:34,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 20:19:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 33468 states and 140336 transitions. [2021-07-13 20:19:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:19:35,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:35,066 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:35,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:35,267 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:35,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1022951253, now seen corresponding path program 33 times [2021-07-13 20:19:35,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:35,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477248399] [2021-07-13 20:19:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:35,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:35,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477248399] [2021-07-13 20:19:35,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477248399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:35,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917787929] [2021-07-13 20:19:35,376 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:35,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:19:35,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:35,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:19:35,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:35,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:35,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:35,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:35,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:35,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 46 [2021-07-13 20:19:35,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-13 20:19:35,962 INFO L628 ElimStorePlain]: treesize reduction 55, result has 42.1 percent of original size [2021-07-13 20:19:35,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:35,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:38 [2021-07-13 20:19:36,082 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 27 treesize of output 21 [2021-07-13 20:19:36,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:36,090 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-07-13 20:19:36,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:36,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-07-13 20:19:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:36,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917787929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:36,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:36,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-13 20:19:36,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033769424] [2021-07-13 20:19:36,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:36,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:36,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:36,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:36,128 INFO L87 Difference]: Start difference. First operand 33468 states and 140336 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 20:19:37,254 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-07-13 20:19:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:39,323 INFO L93 Difference]: Finished difference Result 77832 states and 316391 transitions. [2021-07-13 20:19:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:19:39,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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) Word has length 39 [2021-07-13 20:19:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:39,834 INFO L225 Difference]: With dead ends: 77832 [2021-07-13 20:19:39,835 INFO L226 Difference]: Without dead ends: 77444 [2021-07-13 20:19:39,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2146.2ms TimeCoverageRelationStatistics Valid=551, Invalid=3109, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:19:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77444 states. [2021-07-13 20:19:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77444 to 34685. [2021-07-13 20:19:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34685 states, 34684 states have (on average 4.195969323030792) internal successors, (145533), 34684 states have internal predecessors, (145533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34685 states to 34685 states and 145533 transitions. [2021-07-13 20:19:41,384 INFO L78 Accepts]: Start accepts. Automaton has 34685 states and 145533 transitions. Word has length 39 [2021-07-13 20:19:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:41,384 INFO L482 AbstractCegarLoop]: Abstraction has 34685 states and 145533 transitions. [2021-07-13 20:19:41,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 20:19:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 34685 states and 145533 transitions. [2021-07-13 20:19:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:19:41,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:41,462 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:41,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:19:41,663 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:41,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1976270763, now seen corresponding path program 34 times [2021-07-13 20:19:41,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:41,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048368204] [2021-07-13 20:19:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:41,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:41,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048368204] [2021-07-13 20:19:41,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048368204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:41,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944374530] [2021-07-13 20:19:41,786 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:41,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:42,070 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:19:42,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2021-07-13 20:19:42,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:42,078 INFO L628 ElimStorePlain]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:19:42,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:42,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:13 [2021-07-13 20:19:42,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 20:19:42,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:42,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:42,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:42,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:7 [2021-07-13 20:19:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:42,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944374530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:42,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:42,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:19:42,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754070814] [2021-07-13 20:19:42,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:42,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:42,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:42,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:42,144 INFO L87 Difference]: Start difference. First operand 34685 states and 145533 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 20:19:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:44,239 INFO L93 Difference]: Finished difference Result 85928 states and 351701 transitions. [2021-07-13 20:19:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:19:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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) Word has length 39 [2021-07-13 20:19:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:44,835 INFO L225 Difference]: With dead ends: 85928 [2021-07-13 20:19:44,835 INFO L226 Difference]: Without dead ends: 85554 [2021-07-13 20:19:44,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 913.1ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:19:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85554 states. [2021-07-13 20:19:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85554 to 35149. [2021-07-13 20:19:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35149 states, 35148 states have (on average 4.186383293501764) internal successors, (147143), 35148 states have internal predecessors, (147143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35149 states to 35149 states and 147143 transitions. [2021-07-13 20:19:46,398 INFO L78 Accepts]: Start accepts. Automaton has 35149 states and 147143 transitions. Word has length 39 [2021-07-13 20:19:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:46,399 INFO L482 AbstractCegarLoop]: Abstraction has 35149 states and 147143 transitions. [2021-07-13 20:19:46,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 20:19:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 35149 states and 147143 transitions. [2021-07-13 20:19:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:19:46,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:46,480 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:46,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:46,704 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1473061487, now seen corresponding path program 35 times [2021-07-13 20:19:46,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:46,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317169756] [2021-07-13 20:19:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:46,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:46,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317169756] [2021-07-13 20:19:46,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317169756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:46,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660681119] [2021-07-13 20:19:46,825 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:46,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:19:46,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:46,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:19:46,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:47,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-07-13 20:19:47,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:47,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:47,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:19:47,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:45 [2021-07-13 20:19:47,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:47,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:47,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:47,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:47,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 88 [2021-07-13 20:19:47,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:19:47,532 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-07-13 20:19:47,532 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.1 percent of original size [2021-07-13 20:19:47,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:19:47,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:35 [2021-07-13 20:19:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:47,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660681119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:47,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:47,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-13 20:19:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680127403] [2021-07-13 20:19:47,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:47,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:47,594 INFO L87 Difference]: Start difference. First operand 35149 states and 147143 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 20:19:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:51,452 INFO L93 Difference]: Finished difference Result 130493 states and 529008 transitions. [2021-07-13 20:19:51,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:19:51,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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) Word has length 39 [2021-07-13 20:19:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:52,107 INFO L225 Difference]: With dead ends: 130493 [2021-07-13 20:19:52,107 INFO L226 Difference]: Without dead ends: 130135 [2021-07-13 20:19:52,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2052.4ms TimeCoverageRelationStatistics Valid=711, Invalid=3449, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:19:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130135 states. [2021-07-13 20:19:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130135 to 38584. [2021-07-13 20:19:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38583 states have (on average 4.202705854910193) internal successors, (162153), 38583 states have internal predecessors, (162153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 162153 transitions. [2021-07-13 20:19:54,556 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 162153 transitions. Word has length 39 [2021-07-13 20:19:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:54,556 INFO L482 AbstractCegarLoop]: Abstraction has 38584 states and 162153 transitions. [2021-07-13 20:19:54,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 20:19:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 162153 transitions. [2021-07-13 20:19:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:19:54,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:54,642 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:54,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 20:19:54,845 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash -497015271, now seen corresponding path program 36 times [2021-07-13 20:19:54,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:54,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180592580] [2021-07-13 20:19:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:54,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:54,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180592580] [2021-07-13 20:19:54,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180592580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:54,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143066901] [2021-07-13 20:19:54,965 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:54,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:54,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:19:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:55,460 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-13 20:19:55,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:55,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:55,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:55,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:55,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:55,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2021-07-13 20:19:55,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:19:55,540 INFO L628 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2021-07-13 20:19:55,542 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 20:19:55,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:36 [2021-07-13 20:19:55,612 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 101 treesize of output 79 [2021-07-13 20:19:56,974 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 1669 DAG size of output: 1673