/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:56:53,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:56:53,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:56:53,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:56:53,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:56:53,549 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:56:53,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:56:53,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:56:53,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:56:53,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:56:53,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:56:53,551 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:56:53,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:56:53,552 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:56:53,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:56:53,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:56:53,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:56:53,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:56:53,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:56:53,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:56:53,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:56:53,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:56:53,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:56:53,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:56:53,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:56:53,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:56:53,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:56:53,554 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:56:53,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:56:53,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:56:53,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:56:53,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:56:53,826 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:56:53,829 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:56:53,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl [2021-06-05 14:56:53,830 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl' [2021-06-05 14:56:53,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:56:53,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:56:53,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:56:53,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:56:53,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:56:53,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... [2021-06-05 14:56:53,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... [2021-06-05 14:56:53,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:56:53,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:56:53,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:56:53,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:56:53,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... [2021-06-05 14:56:53,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... [2021-06-05 14:56:53,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... [2021-06-05 14:56:53,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... [2021-06-05 14:56:53,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... [2021-06-05 14:56:53,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... [2021-06-05 14:56:53,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... [2021-06-05 14:56:53,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:56:53,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:56:53,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:56:53,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:56:53,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:56:53,946 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:56:53,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:56:53,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:56:53,947 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:56:53,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:56:53,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:56:53,947 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:56:53,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:56:53,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:56:53,949 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:56:54,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:56:54,076 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 14:56:54,077 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:56:54 BoogieIcfgContainer [2021-06-05 14:56:54,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:56:54,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:56:54,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:56:54,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:56:54,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:56:53" (1/2) ... [2021-06-05 14:56:54,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a7bbd8 and model type misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:56:54, skipping insertion in model container [2021-06-05 14:56:54,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:56:54" (2/2) ... [2021-06-05 14:56:54,081 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-1.wvr.bpl [2021-06-05 14:56:54,085 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:56:54,085 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:56:54,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:56:54,086 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:56:54,109 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 14:56:54,123 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 14:56:54,150 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:56:54,150 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:56:54,150 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:56:54,150 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:56:54,150 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:56:54,150 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:56:54,150 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:56:54,150 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:56:54,167 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 31 transitions, 78 flow [2021-06-05 14:56:54,188 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:56:54,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:54,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:54,202 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:54,206 INFO L82 PathProgramCache]: Analyzing trace with hash -884848578, now seen corresponding path program 1 times [2021-06-05 14:56:54,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:54,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145539949] [2021-06-05 14:56:54,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:54,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:54,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145539949] [2021-06-05 14:56:54,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145539949] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:56:54,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:56:54,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:56:54,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167238295] [2021-06-05 14:56:54,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:56:54,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:54,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:56:54,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:56:54,486 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:54,649 INFO L93 Difference]: Finished difference Result 299 states and 680 transitions. [2021-06-05 14:56:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:56:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:56:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:54,660 INFO L225 Difference]: With dead ends: 299 [2021-06-05 14:56:54,660 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 14:56:54,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:56:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 14:56:54,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 116. [2021-06-05 14:56:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-06-05 14:56:54,696 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 13 [2021-06-05 14:56:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:54,696 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-06-05 14:56:54,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-06-05 14:56:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:56:54,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:54,698 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:54,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:56:54,698 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash 961813113, now seen corresponding path program 1 times [2021-06-05 14:56:54,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:54,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423635200] [2021-06-05 14:56:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:54,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:54,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423635200] [2021-06-05 14:56:54,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423635200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:54,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365310941] [2021-06-05 14:56:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:54,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 14:56:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:54,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365310941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:54,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:54,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 14:56:54,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477127] [2021-06-05 14:56:54,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:56:54,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:56:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:56:54,906 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:54,989 INFO L93 Difference]: Finished difference Result 284 states and 599 transitions. [2021-06-05 14:56:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:56:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:56:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:54,993 INFO L225 Difference]: With dead ends: 284 [2021-06-05 14:56:54,993 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 14:56:54,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:56:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 14:56:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 124. [2021-06-05 14:56:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-06-05 14:56:55,005 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 17 [2021-06-05 14:56:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:55,005 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-06-05 14:56:55,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-06-05 14:56:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:56:55,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:55,007 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:55,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 14:56:55,209 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:55,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:55,209 INFO L82 PathProgramCache]: Analyzing trace with hash 713419811, now seen corresponding path program 1 times [2021-06-05 14:56:55,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:55,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745176439] [2021-06-05 14:56:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:55,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:55,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745176439] [2021-06-05 14:56:55,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745176439] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:56:55,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:56:55,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:56:55,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51188720] [2021-06-05 14:56:55,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:56:55,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:55,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:56:55,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:56:55,248 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:55,289 INFO L93 Difference]: Finished difference Result 166 states and 354 transitions. [2021-06-05 14:56:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:56:55,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:56:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:55,296 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:56:55,296 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 14:56:55,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:56:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 14:56:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 121. [2021-06-05 14:56:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-06-05 14:56:55,304 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 17 [2021-06-05 14:56:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:55,304 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-06-05 14:56:55,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-06-05 14:56:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:56:55,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:55,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:55,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:56:55,306 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:55,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1233373665, now seen corresponding path program 2 times [2021-06-05 14:56:55,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:55,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673217965] [2021-06-05 14:56:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:55,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673217965] [2021-06-05 14:56:55,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673217965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2284217] [2021-06-05 14:56:55,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:55,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:55,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:55,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 14:56:55,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:55,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2284217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:55,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:55,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 14:56:55,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918093887] [2021-06-05 14:56:55,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:56:55,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:55,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:56:55,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:56:55,433 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:55,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:55,530 INFO L93 Difference]: Finished difference Result 242 states and 545 transitions. [2021-06-05 14:56:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:56:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:56:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:55,532 INFO L225 Difference]: With dead ends: 242 [2021-06-05 14:56:55,532 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 14:56:55,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:56:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 14:56:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 125. [2021-06-05 14:56:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 14:56:55,547 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 17 [2021-06-05 14:56:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:55,547 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 14:56:55,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 14:56:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:56:55,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:55,551 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:55,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:55,762 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:55,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1164039970, now seen corresponding path program 1 times [2021-06-05 14:56:55,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:55,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128219009] [2021-06-05 14:56:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:55,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:55,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128219009] [2021-06-05 14:56:55,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128219009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:55,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436487959] [2021-06-05 14:56:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:55,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:56,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:56:56,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:56,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:56,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:56,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 14:56:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:56,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436487959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:56,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:56,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-05 14:56:56,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212146376] [2021-06-05 14:56:56,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:56:56,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:56,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:56:56,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:56:56,142 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 14:56:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:56,371 INFO L93 Difference]: Finished difference Result 441 states and 1008 transitions. [2021-06-05 14:56:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:56:56,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 21 [2021-06-05 14:56:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:56,373 INFO L225 Difference]: With dead ends: 441 [2021-06-05 14:56:56,373 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 14:56:56,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:56:56,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 14:56:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 191. [2021-06-05 14:56:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-06-05 14:56:56,379 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 21 [2021-06-05 14:56:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:56,379 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-06-05 14:56:56,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 14:56:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-06-05 14:56:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:56:56,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:56,380 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:56,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:56,595 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash 501161696, now seen corresponding path program 2 times [2021-06-05 14:56:56,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:56,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973346887] [2021-06-05 14:56:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:56,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:56,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973346887] [2021-06-05 14:56:56,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973346887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:56,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981652354] [2021-06-05 14:56:56,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:56,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:56,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:56,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:56,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:56,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:56,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:56,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:56,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:56,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 14:56:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:56,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981652354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:56,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:56,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-05 14:56:56,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475825604] [2021-06-05 14:56:56,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:56:56,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:56:56,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:56:56,892 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-05 14:56:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:57,083 INFO L93 Difference]: Finished difference Result 432 states and 992 transitions. [2021-06-05 14:56:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:56:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 21 [2021-06-05 14:56:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:57,085 INFO L225 Difference]: With dead ends: 432 [2021-06-05 14:56:57,085 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 14:56:57,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:56:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 14:56:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2021-06-05 14:56:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1940298507462686) internal successors, (441), 201 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:57,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 441 transitions. [2021-06-05 14:56:57,090 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 441 transitions. Word has length 21 [2021-06-05 14:56:57,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:57,091 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 441 transitions. [2021-06-05 14:56:57,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-05 14:56:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 441 transitions. [2021-06-05 14:56:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:56:57,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:57,091 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:57,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:57,305 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:57,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:57,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2037404550, now seen corresponding path program 3 times [2021-06-05 14:56:57,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:57,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476968352] [2021-06-05 14:56:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:57,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476968352] [2021-06-05 14:56:57,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476968352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285247900] [2021-06-05 14:56:57,417 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:57,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:56:57,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:57,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:57,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:56:57,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:57,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:57,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:57,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 14:56:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:57,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285247900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:57,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:57,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-05 14:56:57,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344452251] [2021-06-05 14:56:57,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:56:57,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:57,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:56:57,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:56:57,560 INFO L87 Difference]: Start difference. First operand 202 states and 441 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:57,755 INFO L93 Difference]: Finished difference Result 440 states and 1008 transitions. [2021-06-05 14:56:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:56:57,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:56:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:57,758 INFO L225 Difference]: With dead ends: 440 [2021-06-05 14:56:57,758 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 14:56:57,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:56:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 14:56:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 199. [2021-06-05 14:56:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.191919191919192) internal successors, (434), 198 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 434 transitions. [2021-06-05 14:56:57,766 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 434 transitions. Word has length 21 [2021-06-05 14:56:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:57,766 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 434 transitions. [2021-06-05 14:56:57,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 434 transitions. [2021-06-05 14:56:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:56:57,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:57,767 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:57,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 14:56:57,981 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:57,981 INFO L82 PathProgramCache]: Analyzing trace with hash 107399676, now seen corresponding path program 4 times [2021-06-05 14:56:57,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:57,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504402465] [2021-06-05 14:56:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:58,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:58,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504402465] [2021-06-05 14:56:58,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504402465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:58,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553596545] [2021-06-05 14:56:58,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:58,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:56:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:58,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:56:58,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:58,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:58,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:58,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 14:56:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:58,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553596545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:58,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:58,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-06-05 14:56:58,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949713971] [2021-06-05 14:56:58,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:56:58,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:58,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:56:58,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:56:58,291 INFO L87 Difference]: Start difference. First operand 199 states and 434 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-06-05 14:56:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:58,624 INFO L93 Difference]: Finished difference Result 471 states and 1075 transitions. [2021-06-05 14:56:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:56:58,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 21 [2021-06-05 14:56:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:58,626 INFO L225 Difference]: With dead ends: 471 [2021-06-05 14:56:58,626 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 14:56:58,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 14:56:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 224. [2021-06-05 14:56:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-06-05 14:56:58,631 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-06-05 14:56:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:58,632 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-06-05 14:56:58,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-06-05 14:56:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-06-05 14:56:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:56:58,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:58,632 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:58,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:58,841 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:58,841 INFO L82 PathProgramCache]: Analyzing trace with hash -513087460, now seen corresponding path program 5 times [2021-06-05 14:56:58,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:58,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016536181] [2021-06-05 14:56:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:58,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:58,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016536181] [2021-06-05 14:56:58,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016536181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:58,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135244347] [2021-06-05 14:56:58,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:58,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:56:58,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:59,046 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 14:56:59,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-06-05 14:56:59,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:59,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:59,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:59,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:10 [2021-06-05 14:56:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:59,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135244347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:59,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:59,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-06-05 14:56:59,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419078966] [2021-06-05 14:56:59,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:56:59,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:59,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:56:59,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:56:59,097 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-06-05 14:56:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:59,368 INFO L93 Difference]: Finished difference Result 472 states and 1084 transitions. [2021-06-05 14:56:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:56:59,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 21 [2021-06-05 14:56:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:59,370 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:56:59,370 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:56:59,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:56:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 233. [2021-06-05 14:56:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.206896551724138) internal successors, (512), 232 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 512 transitions. [2021-06-05 14:56:59,376 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 512 transitions. Word has length 21 [2021-06-05 14:56:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:59,376 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 512 transitions. [2021-06-05 14:56:59,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-06-05 14:56:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 512 transitions. [2021-06-05 14:56:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:56:59,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:59,376 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:59,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:59,593 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash 152115708, now seen corresponding path program 6 times [2021-06-05 14:56:59,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:59,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969344755] [2021-06-05 14:56:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:59,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969344755] [2021-06-05 14:56:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969344755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088851621] [2021-06-05 14:56:59,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:59,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:56:59,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:59,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:59,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:56:59,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:59,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:59,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:59,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 14:56:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:59,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088851621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:59,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:59,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-06-05 14:56:59,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246188656] [2021-06-05 14:56:59,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:56:59,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:59,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:56:59,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:56:59,840 INFO L87 Difference]: Start difference. First operand 233 states and 512 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-05 14:57:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:00,063 INFO L93 Difference]: Finished difference Result 469 states and 1074 transitions. [2021-06-05 14:57:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:57:00,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 21 [2021-06-05 14:57:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:00,066 INFO L225 Difference]: With dead ends: 469 [2021-06-05 14:57:00,066 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 14:57:00,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 14:57:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 224. [2021-06-05 14:57:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-06-05 14:57:00,071 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-06-05 14:57:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:00,071 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-06-05 14:57:00,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-05 14:57:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-06-05 14:57:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:00,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:00,073 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:00,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 14:57:00,293 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash -696020967, now seen corresponding path program 7 times [2021-06-05 14:57:00,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:00,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043548450] [2021-06-05 14:57:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:00,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:00,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043548450] [2021-06-05 14:57:00,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043548450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:00,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095797401] [2021-06-05 14:57:00,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:00,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:00,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095797401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:00,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:00,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:57:00,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966239358] [2021-06-05 14:57:00,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:57:00,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:57:00,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:57:00,385 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:00,487 INFO L93 Difference]: Finished difference Result 475 states and 1004 transitions. [2021-06-05 14:57:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:00,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 25 [2021-06-05 14:57:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:00,489 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:57:00,489 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:57:00,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:57:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:57:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 295. [2021-06-05 14:57:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.302721088435374) internal successors, (677), 294 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 677 transitions. [2021-06-05 14:57:00,495 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 677 transitions. Word has length 25 [2021-06-05 14:57:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:00,495 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 677 transitions. [2021-06-05 14:57:00,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 677 transitions. [2021-06-05 14:57:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:00,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:00,496 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:00,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:00,712 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1371569347, now seen corresponding path program 8 times [2021-06-05 14:57:00,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:00,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631068999] [2021-06-05 14:57:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:00,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631068999] [2021-06-05 14:57:00,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631068999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:00,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293310693] [2021-06-05 14:57:00,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:00,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:00,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:00,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:00,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:00,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293310693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:00,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:00,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:57:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694632653] [2021-06-05 14:57:00,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:57:00,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:57:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:57:00,809 INFO L87 Difference]: Start difference. First operand 295 states and 677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:00,922 INFO L93 Difference]: Finished difference Result 596 states and 1335 transitions. [2021-06-05 14:57:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 25 [2021-06-05 14:57:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:00,924 INFO L225 Difference]: With dead ends: 596 [2021-06-05 14:57:00,924 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 14:57:00,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:57:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 14:57:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 476. [2021-06-05 14:57:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.351578947368421) internal successors, (1117), 475 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1117 transitions. [2021-06-05 14:57:00,932 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1117 transitions. Word has length 25 [2021-06-05 14:57:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:00,933 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1117 transitions. [2021-06-05 14:57:00,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1117 transitions. [2021-06-05 14:57:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:00,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:00,934 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:01,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:01,149 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:01,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:01,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2027124135, now seen corresponding path program 9 times [2021-06-05 14:57:01,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:01,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210351218] [2021-06-05 14:57:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:01,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210351218] [2021-06-05 14:57:01,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210351218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066538631] [2021-06-05 14:57:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:01,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:01,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:01,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:01,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:01,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066538631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:01,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:01,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 14:57:01,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413245976] [2021-06-05 14:57:01,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:01,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:01,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:01,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:01,239 INFO L87 Difference]: Start difference. First operand 476 states and 1117 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:01,319 INFO L93 Difference]: Finished difference Result 552 states and 1237 transitions. [2021-06-05 14:57:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:01,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 25 [2021-06-05 14:57:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:01,321 INFO L225 Difference]: With dead ends: 552 [2021-06-05 14:57:01,321 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 14:57:01,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 14:57:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 471. [2021-06-05 14:57:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.331914893617021) internal successors, (1096), 470 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1096 transitions. [2021-06-05 14:57:01,329 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1096 transitions. Word has length 25 [2021-06-05 14:57:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:01,329 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1096 transitions. [2021-06-05 14:57:01,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1096 transitions. [2021-06-05 14:57:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:01,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:01,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:01,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 14:57:01,545 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1525256391, now seen corresponding path program 10 times [2021-06-05 14:57:01,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:01,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792038298] [2021-06-05 14:57:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:01,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:01,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792038298] [2021-06-05 14:57:01,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792038298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:01,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329567262] [2021-06-05 14:57:01,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:01,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:01,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:01,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:01,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:01,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329567262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:01,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:01,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 14:57:01,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672236354] [2021-06-05 14:57:01,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:01,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:01,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:01,623 INFO L87 Difference]: Start difference. First operand 471 states and 1096 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:01,709 INFO L93 Difference]: Finished difference Result 568 states and 1272 transitions. [2021-06-05 14:57:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:57:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 25 [2021-06-05 14:57:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:01,711 INFO L225 Difference]: With dead ends: 568 [2021-06-05 14:57:01,712 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 14:57:01,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:57:01,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 14:57:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 474. [2021-06-05 14:57:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.3255813953488373) internal successors, (1100), 473 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1100 transitions. [2021-06-05 14:57:01,720 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1100 transitions. Word has length 25 [2021-06-05 14:57:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:01,720 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1100 transitions. [2021-06-05 14:57:01,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1100 transitions. [2021-06-05 14:57:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:01,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:01,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:01,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 14:57:01,933 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1162212465, now seen corresponding path program 11 times [2021-06-05 14:57:01,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:01,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483085516] [2021-06-05 14:57:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:01,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:01,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483085516] [2021-06-05 14:57:01,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483085516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:01,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316977238] [2021-06-05 14:57:01,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:01,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:57:01,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:01,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:01,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:02,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316977238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:02,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:02,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 14:57:02,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750389866] [2021-06-05 14:57:02,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:02,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:02,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:02,024 INFO L87 Difference]: Start difference. First operand 474 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:02,099 INFO L93 Difference]: Finished difference Result 699 states and 1561 transitions. [2021-06-05 14:57:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:02,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:57:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:02,101 INFO L225 Difference]: With dead ends: 699 [2021-06-05 14:57:02,101 INFO L226 Difference]: Without dead ends: 699 [2021-06-05 14:57:02,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-05 14:57:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 552. [2021-06-05 14:57:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.3611615245009077) internal successors, (1301), 551 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1301 transitions. [2021-06-05 14:57:02,110 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1301 transitions. Word has length 25 [2021-06-05 14:57:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:02,110 INFO L482 AbstractCegarLoop]: Abstraction has 552 states and 1301 transitions. [2021-06-05 14:57:02,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1301 transitions. [2021-06-05 14:57:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:02,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:02,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:02,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 14:57:02,327 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:02,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1664080209, now seen corresponding path program 12 times [2021-06-05 14:57:02,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:02,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586549543] [2021-06-05 14:57:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:02,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:02,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586549543] [2021-06-05 14:57:02,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586549543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:02,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105014034] [2021-06-05 14:57:02,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:02,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:57:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:02,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105014034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:02,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:02,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 14:57:02,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74345026] [2021-06-05 14:57:02,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:02,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:02,401 INFO L87 Difference]: Start difference. First operand 552 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:02,479 INFO L93 Difference]: Finished difference Result 875 states and 2015 transitions. [2021-06-05 14:57:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:57:02,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:57:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:02,482 INFO L225 Difference]: With dead ends: 875 [2021-06-05 14:57:02,482 INFO L226 Difference]: Without dead ends: 872 [2021-06-05 14:57:02,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:57:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-05 14:57:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 717. [2021-06-05 14:57:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.403631284916201) internal successors, (1721), 716 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1721 transitions. [2021-06-05 14:57:02,493 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1721 transitions. Word has length 25 [2021-06-05 14:57:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:02,493 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1721 transitions. [2021-06-05 14:57:02,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1721 transitions. [2021-06-05 14:57:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:02,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:02,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:02,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:02,709 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:02,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1322657579, now seen corresponding path program 13 times [2021-06-05 14:57:02,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:02,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313584239] [2021-06-05 14:57:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:02,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:02,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313584239] [2021-06-05 14:57:02,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313584239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:02,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185776201] [2021-06-05 14:57:02,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:02,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:02,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:02,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185776201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:02,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:02,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 14:57:02,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126736590] [2021-06-05 14:57:02,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:02,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:02,782 INFO L87 Difference]: Start difference. First operand 717 states and 1721 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:02,859 INFO L93 Difference]: Finished difference Result 880 states and 2012 transitions. [2021-06-05 14:57:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:02,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:57:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:02,861 INFO L225 Difference]: With dead ends: 880 [2021-06-05 14:57:02,861 INFO L226 Difference]: Without dead ends: 880 [2021-06-05 14:57:02,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-06-05 14:57:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 703. [2021-06-05 14:57:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4017094017094016) internal successors, (1686), 702 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1686 transitions. [2021-06-05 14:57:02,872 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1686 transitions. Word has length 25 [2021-06-05 14:57:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:02,872 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 1686 transitions. [2021-06-05 14:57:02,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1686 transitions. [2021-06-05 14:57:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:02,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:02,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:03,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:57:03,089 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2065651895, now seen corresponding path program 14 times [2021-06-05 14:57:03,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:03,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406921636] [2021-06-05 14:57:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:03,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:03,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406921636] [2021-06-05 14:57:03,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406921636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:03,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429829909] [2021-06-05 14:57:03,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:03,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:03,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:03,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:03,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:03,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429829909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:03,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:03,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 14:57:03,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409962719] [2021-06-05 14:57:03,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:03,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:03,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:03,157 INFO L87 Difference]: Start difference. First operand 703 states and 1686 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:03,266 INFO L93 Difference]: Finished difference Result 810 states and 1869 transitions. [2021-06-05 14:57:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:57:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:57:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:03,268 INFO L225 Difference]: With dead ends: 810 [2021-06-05 14:57:03,268 INFO L226 Difference]: Without dead ends: 806 [2021-06-05 14:57:03,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:57:03,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-06-05 14:57:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 703. [2021-06-05 14:57:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4002849002849005) internal successors, (1685), 702 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1685 transitions. [2021-06-05 14:57:03,279 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1685 transitions. Word has length 25 [2021-06-05 14:57:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:03,279 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 1685 transitions. [2021-06-05 14:57:03,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1685 transitions. [2021-06-05 14:57:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:03,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:03,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:03,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 14:57:03,489 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash 893466037, now seen corresponding path program 15 times [2021-06-05 14:57:03,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:03,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220699372] [2021-06-05 14:57:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:03,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:03,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220699372] [2021-06-05 14:57:03,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220699372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:03,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565913543] [2021-06-05 14:57:03,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:03,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:03,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:03,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:03,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565913543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:03,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:03,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:57:03,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868191078] [2021-06-05 14:57:03,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:57:03,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:57:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:57:03,583 INFO L87 Difference]: Start difference. First operand 703 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:03,683 INFO L93 Difference]: Finished difference Result 795 states and 1844 transitions. [2021-06-05 14:57:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:57:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:03,685 INFO L225 Difference]: With dead ends: 795 [2021-06-05 14:57:03,685 INFO L226 Difference]: Without dead ends: 795 [2021-06-05 14:57:03,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:57:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-06-05 14:57:03,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 698. [2021-06-05 14:57:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.3916786226685796) internal successors, (1667), 697 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1667 transitions. [2021-06-05 14:57:03,695 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1667 transitions. Word has length 25 [2021-06-05 14:57:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:03,695 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 1667 transitions. [2021-06-05 14:57:03,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1667 transitions. [2021-06-05 14:57:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:57:03,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:03,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:03,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:03,912 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:03,913 INFO L82 PathProgramCache]: Analyzing trace with hash -886523081, now seen corresponding path program 16 times [2021-06-05 14:57:03,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:03,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941872616] [2021-06-05 14:57:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:03,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:03,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941872616] [2021-06-05 14:57:03,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941872616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:03,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556735909] [2021-06-05 14:57:03,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:03,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:03,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:03,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:03,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556735909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:03,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:03,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:57:03,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268910912] [2021-06-05 14:57:03,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:57:03,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:03,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:57:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:57:03,996 INFO L87 Difference]: Start difference. First operand 698 states and 1667 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:04,085 INFO L93 Difference]: Finished difference Result 856 states and 1953 transitions. [2021-06-05 14:57:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:04,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:57:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:04,087 INFO L225 Difference]: With dead ends: 856 [2021-06-05 14:57:04,087 INFO L226 Difference]: Without dead ends: 835 [2021-06-05 14:57:04,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:57:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-06-05 14:57:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 719. [2021-06-05 14:57:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.370473537604457) internal successors, (1702), 718 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1702 transitions. [2021-06-05 14:57:04,098 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1702 transitions. Word has length 25 [2021-06-05 14:57:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:04,098 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 1702 transitions. [2021-06-05 14:57:04,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1702 transitions. [2021-06-05 14:57:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:04,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:04,099 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:04,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:04,305 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:04,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:04,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1579561346, now seen corresponding path program 17 times [2021-06-05 14:57:04,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:04,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566018451] [2021-06-05 14:57:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:04,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:04,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566018451] [2021-06-05 14:57:04,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566018451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:04,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023963758] [2021-06-05 14:57:04,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:04,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:57:04,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:04,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:57:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:04,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:04,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:04,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:04,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:04,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:04,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023963758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:04,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:04,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 14:57:04,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091398484] [2021-06-05 14:57:04,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:57:04,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:04,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:57:04,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:57:04,759 INFO L87 Difference]: Start difference. First operand 719 states and 1702 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:05,761 INFO L93 Difference]: Finished difference Result 1938 states and 4685 transitions. [2021-06-05 14:57:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:57:05,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:05,766 INFO L225 Difference]: With dead ends: 1938 [2021-06-05 14:57:05,766 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 14:57:05,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 594.4ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:57:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 14:57:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 773. [2021-06-05 14:57:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.36139896373057) internal successors, (1823), 772 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1823 transitions. [2021-06-05 14:57:05,784 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1823 transitions. Word has length 29 [2021-06-05 14:57:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:05,784 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 1823 transitions. [2021-06-05 14:57:05,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1823 transitions. [2021-06-05 14:57:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:05,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:05,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:06,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:06,001 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash 298021654, now seen corresponding path program 18 times [2021-06-05 14:57:06,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:06,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532056139] [2021-06-05 14:57:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:06,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:06,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532056139] [2021-06-05 14:57:06,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532056139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:06,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198428315] [2021-06-05 14:57:06,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:06,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:57:06,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:06,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:06,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:06,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:06,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:06,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:06,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 14:57:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:06,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198428315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:06,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:06,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 14:57:06,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135751908] [2021-06-05 14:57:06,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:06,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:06,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:06,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:06,443 INFO L87 Difference]: Start difference. First operand 773 states and 1823 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:07,425 INFO L93 Difference]: Finished difference Result 2173 states and 5321 transitions. [2021-06-05 14:57:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:57:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:07,431 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 14:57:07,431 INFO L226 Difference]: Without dead ends: 2162 [2021-06-05 14:57:07,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 695.1ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:57:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-06-05 14:57:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 807. [2021-06-05 14:57:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3734491315136474) internal successors, (1913), 806 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1913 transitions. [2021-06-05 14:57:07,458 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1913 transitions. Word has length 29 [2021-06-05 14:57:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:07,458 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1913 transitions. [2021-06-05 14:57:07,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1913 transitions. [2021-06-05 14:57:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:07,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:07,459 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:07,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 14:57:07,665 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:07,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2054422704, now seen corresponding path program 19 times [2021-06-05 14:57:07,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:07,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182167468] [2021-06-05 14:57:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:07,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:07,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182167468] [2021-06-05 14:57:07,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182167468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:07,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742102883] [2021-06-05 14:57:07,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:07,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:08,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:08,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:08,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:08,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:08,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 14:57:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:08,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742102883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:08,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:08,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 14:57:08,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959461460] [2021-06-05 14:57:08,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:08,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:08,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:08,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:08,071 INFO L87 Difference]: Start difference. First operand 807 states and 1913 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:09,161 INFO L93 Difference]: Finished difference Result 2310 states and 5631 transitions. [2021-06-05 14:57:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:57:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:09,167 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 14:57:09,167 INFO L226 Difference]: Without dead ends: 2290 [2021-06-05 14:57:09,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 717.0ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:57:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-06-05 14:57:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 796. [2021-06-05 14:57:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.372327044025157) internal successors, (1886), 795 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1886 transitions. [2021-06-05 14:57:09,182 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1886 transitions. Word has length 29 [2021-06-05 14:57:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:09,182 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 1886 transitions. [2021-06-05 14:57:09,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1886 transitions. [2021-06-05 14:57:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:09,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:09,183 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:09,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 14:57:09,397 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 483082792, now seen corresponding path program 20 times [2021-06-05 14:57:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:09,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470599277] [2021-06-05 14:57:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:09,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470599277] [2021-06-05 14:57:09,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470599277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:09,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095786097] [2021-06-05 14:57:09,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:09,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:09,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:09,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:09,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:09,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:09,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:09,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:09,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:09,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:09,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095786097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:09,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:09,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 14:57:09,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319987785] [2021-06-05 14:57:09,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:57:09,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:09,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:57:09,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:57:09,814 INFO L87 Difference]: Start difference. First operand 796 states and 1886 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:10,945 INFO L93 Difference]: Finished difference Result 2101 states and 5071 transitions. [2021-06-05 14:57:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:57:10,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:10,962 INFO L225 Difference]: With dead ends: 2101 [2021-06-05 14:57:10,962 INFO L226 Difference]: Without dead ends: 2078 [2021-06-05 14:57:10,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:57:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-06-05 14:57:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 800. [2021-06-05 14:57:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-06-05 14:57:10,976 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-06-05 14:57:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:10,976 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-06-05 14:57:10,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-06-05 14:57:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:10,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:10,978 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:11,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:11,194 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:11,194 INFO L82 PathProgramCache]: Analyzing trace with hash -830162232, now seen corresponding path program 21 times [2021-06-05 14:57:11,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:11,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897824027] [2021-06-05 14:57:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:11,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:11,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897824027] [2021-06-05 14:57:11,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897824027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:11,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644101248] [2021-06-05 14:57:11,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:11,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:11,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:11,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:57:11,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:57:11,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:11,751 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:11,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:11,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:11,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:11,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:10 [2021-06-05 14:57:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:11,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644101248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:11,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:11,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 14:57:11,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638869597] [2021-06-05 14:57:11,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:57:11,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:57:11,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:57:11,791 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-06-05 14:57:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:13,009 INFO L93 Difference]: Finished difference Result 1859 states and 4469 transitions. [2021-06-05 14:57:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:57:13,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 29 [2021-06-05 14:57:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:13,013 INFO L225 Difference]: With dead ends: 1859 [2021-06-05 14:57:13,013 INFO L226 Difference]: Without dead ends: 1849 [2021-06-05 14:57:13,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 911.9ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:57:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-06-05 14:57:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 800. [2021-06-05 14:57:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-06-05 14:57:13,026 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-06-05 14:57:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:13,026 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-06-05 14:57:13,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-06-05 14:57:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-06-05 14:57:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:13,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:13,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:13,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 14:57:13,243 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash 813575516, now seen corresponding path program 22 times [2021-06-05 14:57:13,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:13,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258880798] [2021-06-05 14:57:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:13,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258880798] [2021-06-05 14:57:13,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258880798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687792567] [2021-06-05 14:57:13,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:13,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:13,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:13,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:13,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:13,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:13,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:13,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:13,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:13,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:13,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687792567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:13,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:13,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-06-05 14:57:13,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473785557] [2021-06-05 14:57:13,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:13,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:13,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:13,695 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:15,033 INFO L93 Difference]: Finished difference Result 2092 states and 5123 transitions. [2021-06-05 14:57:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:57:15,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:15,036 INFO L225 Difference]: With dead ends: 2092 [2021-06-05 14:57:15,036 INFO L226 Difference]: Without dead ends: 2083 [2021-06-05 14:57:15,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 815.6ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:57:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-05 14:57:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 825. [2021-06-05 14:57:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.371359223300971) internal successors, (1954), 824 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1954 transitions. [2021-06-05 14:57:15,050 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1954 transitions. Word has length 29 [2021-06-05 14:57:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:15,050 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 1954 transitions. [2021-06-05 14:57:15,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1954 transitions. [2021-06-05 14:57:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:15,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:15,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:15,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:15,265 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash 193088380, now seen corresponding path program 23 times [2021-06-05 14:57:15,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:15,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331523391] [2021-06-05 14:57:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:15,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331523391] [2021-06-05 14:57:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331523391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491926983] [2021-06-05 14:57:15,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:15,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:57:15,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:15,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:15,647 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 14:57:15,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-06-05 14:57:15,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:15,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:15,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:15,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-06-05 14:57:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:15,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491926983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:15,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:15,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-06-05 14:57:15,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935407731] [2021-06-05 14:57:15,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:15,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:15,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:15,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:15,688 INFO L87 Difference]: Start difference. First operand 825 states and 1954 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:16,759 INFO L93 Difference]: Finished difference Result 2113 states and 5192 transitions. [2021-06-05 14:57:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:57:16,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:16,767 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 14:57:16,767 INFO L226 Difference]: Without dead ends: 2102 [2021-06-05 14:57:16,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 757.6ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:57:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-06-05 14:57:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 837. [2021-06-05 14:57:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.373205741626794) internal successors, (1984), 836 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1984 transitions. [2021-06-05 14:57:16,785 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1984 transitions. Word has length 29 [2021-06-05 14:57:16,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:16,785 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 1984 transitions. [2021-06-05 14:57:16,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:16,785 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1984 transitions. [2021-06-05 14:57:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:16,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:16,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:17,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 14:57:17,001 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash 858291548, now seen corresponding path program 24 times [2021-06-05 14:57:17,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:17,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041790065] [2021-06-05 14:57:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:17,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:17,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041790065] [2021-06-05 14:57:17,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041790065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:17,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606793598] [2021-06-05 14:57:17,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:17,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:57:17,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:17,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:57:17,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:17,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:17,425 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 28 treesize of output 32 [2021-06-05 14:57:17,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:57:17,494 INFO L628 ElimStorePlain]: treesize reduction 24, result has 65.2 percent of original size [2021-06-05 14:57:17,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:17,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:45 [2021-06-05 14:57:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:17,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606793598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:17,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:17,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 14:57:17,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461919837] [2021-06-05 14:57:17,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:57:17,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:17,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:57:17,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:17,610 INFO L87 Difference]: Start difference. First operand 837 states and 1984 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:19,807 INFO L93 Difference]: Finished difference Result 2331 states and 5739 transitions. [2021-06-05 14:57:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 14:57:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:19,811 INFO L225 Difference]: With dead ends: 2331 [2021-06-05 14:57:19,811 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 14:57:19,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1586.2ms TimeCoverageRelationStatistics Valid=355, Invalid=2095, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:57:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 14:57:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 824. [2021-06-05 14:57:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-06-05 14:57:19,825 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-06-05 14:57:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:19,825 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-06-05 14:57:19,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-06-05 14:57:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:19,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:19,827 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:20,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 14:57:20,040 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash -949069254, now seen corresponding path program 25 times [2021-06-05 14:57:20,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:20,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457371506] [2021-06-05 14:57:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:20,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:20,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457371506] [2021-06-05 14:57:20,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457371506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:20,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499797561] [2021-06-05 14:57:20,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:20,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:20,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:20,475 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 14:57:20,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-06-05 14:57:20,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:20,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:20,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:20,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-06-05 14:57:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:20,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499797561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:20,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:20,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 14:57:20,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691923307] [2021-06-05 14:57:20,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:20,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:20,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:20,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:20,512 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:21,689 INFO L93 Difference]: Finished difference Result 2128 states and 5217 transitions. [2021-06-05 14:57:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:57:21,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:21,693 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 14:57:21,693 INFO L226 Difference]: Without dead ends: 2117 [2021-06-05 14:57:21,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 826.9ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:57:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-06-05 14:57:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 845. [2021-06-05 14:57:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.376777251184834) internal successors, (2006), 844 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2006 transitions. [2021-06-05 14:57:21,707 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2006 transitions. Word has length 29 [2021-06-05 14:57:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:21,707 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2006 transitions. [2021-06-05 14:57:21,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:21,707 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2006 transitions. [2021-06-05 14:57:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:21,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:21,708 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:21,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 14:57:21,924 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash 807331796, now seen corresponding path program 26 times [2021-06-05 14:57:21,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:21,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328048199] [2021-06-05 14:57:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:22,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:22,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328048199] [2021-06-05 14:57:22,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328048199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:22,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94522276] [2021-06-05 14:57:22,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:22,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:22,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:22,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:57:22,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:22,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:22,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:22,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:22,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:22,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 14:57:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:22,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94522276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:22,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:22,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 14:57:22,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943591077] [2021-06-05 14:57:22,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:22,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:22,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:22,386 INFO L87 Difference]: Start difference. First operand 845 states and 2006 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:23,794 INFO L93 Difference]: Finished difference Result 2243 states and 5486 transitions. [2021-06-05 14:57:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:57:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:23,798 INFO L225 Difference]: With dead ends: 2243 [2021-06-05 14:57:23,799 INFO L226 Difference]: Without dead ends: 2223 [2021-06-05 14:57:23,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1079.4ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:57:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-06-05 14:57:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 833. [2021-06-05 14:57:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.373798076923077) internal successors, (1975), 832 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1975 transitions. [2021-06-05 14:57:23,814 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1975 transitions. Word has length 29 [2021-06-05 14:57:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:23,814 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 1975 transitions. [2021-06-05 14:57:23,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1975 transitions. [2021-06-05 14:57:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:23,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:23,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:24,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:24,029 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1958681432, now seen corresponding path program 27 times [2021-06-05 14:57:24,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:24,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674514635] [2021-06-05 14:57:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:24,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:24,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674514635] [2021-06-05 14:57:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674514635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297658231] [2021-06-05 14:57:24,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:24,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:24,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:24,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:57:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:24,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:24,508 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 19 treesize of output 35 [2021-06-05 14:57:24,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:57:24,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:24,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:24,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:109 [2021-06-05 14:57:24,847 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 14:57:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:24,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297658231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:24,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:24,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 14:57:24,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259602176] [2021-06-05 14:57:24,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:57:24,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:57:24,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:57:24,896 INFO L87 Difference]: Start difference. First operand 833 states and 1975 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:27,945 INFO L93 Difference]: Finished difference Result 2108 states and 5089 transitions. [2021-06-05 14:57:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:57:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:27,948 INFO L225 Difference]: With dead ends: 2108 [2021-06-05 14:57:27,948 INFO L226 Difference]: Without dead ends: 2088 [2021-06-05 14:57:27,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2843.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2891, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:57:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-06-05 14:57:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 841. [2021-06-05 14:57:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.3773809523809524) internal successors, (1997), 840 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1997 transitions. [2021-06-05 14:57:27,962 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1997 transitions. Word has length 29 [2021-06-05 14:57:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:27,962 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 1997 transitions. [2021-06-05 14:57:27,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1997 transitions. [2021-06-05 14:57:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:27,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:27,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:28,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 14:57:28,177 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1911744554, now seen corresponding path program 28 times [2021-06-05 14:57:28,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:28,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440523925] [2021-06-05 14:57:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:28,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:28,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440523925] [2021-06-05 14:57:28,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440523925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:28,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928980562] [2021-06-05 14:57:28,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:28,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:28,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:28,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:28,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:28,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:28,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:28,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:28,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:28,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 14:57:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:28,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928980562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:28,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:28,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 14:57:28,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711080820] [2021-06-05 14:57:28,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:28,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:28,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:28,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:28,578 INFO L87 Difference]: Start difference. First operand 841 states and 1997 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:29,354 INFO L93 Difference]: Finished difference Result 2251 states and 5527 transitions. [2021-06-05 14:57:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:57:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:29,357 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 14:57:29,357 INFO L226 Difference]: Without dead ends: 2240 [2021-06-05 14:57:29,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 635.5ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:57:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-06-05 14:57:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 875. [2021-06-05 14:57:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3878718535469106) internal successors, (2087), 874 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2087 transitions. [2021-06-05 14:57:29,372 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2087 transitions. Word has length 29 [2021-06-05 14:57:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:29,372 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2087 transitions. [2021-06-05 14:57:29,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2087 transitions. [2021-06-05 14:57:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:29,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:29,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:29,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:29,590 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash -626821692, now seen corresponding path program 29 times [2021-06-05 14:57:29,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:29,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701727889] [2021-06-05 14:57:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:29,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:29,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701727889] [2021-06-05 14:57:29,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701727889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:29,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825496646] [2021-06-05 14:57:29,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:29,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:57:29,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:29,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:29,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:29,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:29,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:29,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:29,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 14:57:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:29,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825496646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:29,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:29,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 14:57:29,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629163845] [2021-06-05 14:57:29,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:29,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:29,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:29,984 INFO L87 Difference]: Start difference. First operand 875 states and 2087 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:30,805 INFO L93 Difference]: Finished difference Result 2348 states and 5739 transitions. [2021-06-05 14:57:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:57:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:30,807 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 14:57:30,808 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 14:57:30,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 749.3ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:57:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 14:57:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 850. [2021-06-05 14:57:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.380447585394582) internal successors, (2021), 849 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2021 transitions. [2021-06-05 14:57:30,821 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2021 transitions. Word has length 29 [2021-06-05 14:57:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:30,822 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2021 transitions. [2021-06-05 14:57:30,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2021 transitions. [2021-06-05 14:57:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:30,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:30,823 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:31,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 14:57:31,037 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2096805692, now seen corresponding path program 30 times [2021-06-05 14:57:31,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:31,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378515624] [2021-06-05 14:57:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:31,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378515624] [2021-06-05 14:57:31,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378515624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101854284] [2021-06-05 14:57:31,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:31,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:57:31,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:31,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:57:31,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:57:31,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:31,472 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 28 treesize of output 32 [2021-06-05 14:57:31,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:31,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:31,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:31,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:44 [2021-06-05 14:57:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:31,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101854284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:31,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:31,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 14:57:31,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113342227] [2021-06-05 14:57:31,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:57:31,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:31,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:57:31,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:31,631 INFO L87 Difference]: Start difference. First operand 850 states and 2021 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:33,179 INFO L93 Difference]: Finished difference Result 2256 states and 5439 transitions. [2021-06-05 14:57:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:57:33,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:33,181 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 14:57:33,181 INFO L226 Difference]: Without dead ends: 2236 [2021-06-05 14:57:33,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1234.1ms TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:57:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-05 14:57:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 853. [2021-06-05 14:57:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 2.380281690140845) internal successors, (2028), 852 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2028 transitions. [2021-06-05 14:57:33,193 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2028 transitions. Word has length 29 [2021-06-05 14:57:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:33,193 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2028 transitions. [2021-06-05 14:57:33,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2028 transitions. [2021-06-05 14:57:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:33,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:33,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:33,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 14:57:33,405 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash 783560668, now seen corresponding path program 31 times [2021-06-05 14:57:33,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:33,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269608036] [2021-06-05 14:57:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:33,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:33,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269608036] [2021-06-05 14:57:33,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269608036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:33,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625660168] [2021-06-05 14:57:33,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:33,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:33,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:33,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:33,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:33,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:33,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:33,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625660168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:33,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:33,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 14:57:33,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495052227] [2021-06-05 14:57:33,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:57:33,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:33,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:57:33,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:57:33,792 INFO L87 Difference]: Start difference. First operand 853 states and 2028 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:34,605 INFO L93 Difference]: Finished difference Result 2014 states and 4879 transitions. [2021-06-05 14:57:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:57:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:34,607 INFO L225 Difference]: With dead ends: 2014 [2021-06-05 14:57:34,607 INFO L226 Difference]: Without dead ends: 2004 [2021-06-05 14:57:34,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:57:34,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2021-06-05 14:57:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 850. [2021-06-05 14:57:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.380447585394582) internal successors, (2021), 849 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2021 transitions. [2021-06-05 14:57:34,619 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2021 transitions. Word has length 29 [2021-06-05 14:57:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:34,619 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2021 transitions. [2021-06-05 14:57:34,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2021 transitions. [2021-06-05 14:57:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:34,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:34,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:34,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 14:57:34,822 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash -898246588, now seen corresponding path program 32 times [2021-06-05 14:57:34,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:34,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789608629] [2021-06-05 14:57:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:35,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:35,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789608629] [2021-06-05 14:57:35,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789608629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:35,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709736866] [2021-06-05 14:57:35,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:35,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:35,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:57:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:35,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:35,253 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 28 treesize of output 32 [2021-06-05 14:57:35,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:35,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:35,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:35,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-06-05 14:57:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:35,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709736866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:35,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:35,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 14:57:35,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75094099] [2021-06-05 14:57:35,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:57:35,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:57:35,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:57:35,366 INFO L87 Difference]: Start difference. First operand 850 states and 2021 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-06-05 14:57:37,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:37,528 INFO L93 Difference]: Finished difference Result 2408 states and 5830 transitions. [2021-06-05 14:57:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 14:57:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 29 [2021-06-05 14:57:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:37,531 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 14:57:37,531 INFO L226 Difference]: Without dead ends: 2372 [2021-06-05 14:57:37,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1747.7ms TimeCoverageRelationStatistics Valid=474, Invalid=2076, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:57:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-06-05 14:57:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 844. [2021-06-05 14:57:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.377224199288256) internal successors, (2004), 843 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2004 transitions. [2021-06-05 14:57:37,544 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2004 transitions. Word has length 29 [2021-06-05 14:57:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:37,544 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2004 transitions. [2021-06-05 14:57:37,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-06-05 14:57:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2004 transitions. [2021-06-05 14:57:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:37,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:37,545 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:37,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 14:57:37,754 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:37,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1211178052, now seen corresponding path program 33 times [2021-06-05 14:57:37,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:37,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451625993] [2021-06-05 14:57:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:37,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:37,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451625993] [2021-06-05 14:57:37,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451625993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:37,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629431925] [2021-06-05 14:57:37,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:37,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:37,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:37,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:37,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:38,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:57:38,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:38,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:38,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:38,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:38,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629431925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:38,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:38,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 14:57:38,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475131085] [2021-06-05 14:57:38,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:57:38,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:38,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:57:38,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:57:38,160 INFO L87 Difference]: Start difference. First operand 844 states and 2004 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:39,202 INFO L93 Difference]: Finished difference Result 2149 states and 5171 transitions. [2021-06-05 14:57:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:57:39,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:39,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:39,204 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 14:57:39,204 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 14:57:39,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 797.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:57:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 14:57:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 824. [2021-06-05 14:57:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-06-05 14:57:39,217 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-06-05 14:57:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:39,217 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-06-05 14:57:39,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-06-05 14:57:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:39,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:39,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:39,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:39,425 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:39,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2108871402, now seen corresponding path program 34 times [2021-06-05 14:57:39,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:39,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213420945] [2021-06-05 14:57:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:39,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:39,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213420945] [2021-06-05 14:57:39,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213420945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:39,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212610981] [2021-06-05 14:57:39,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:39,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:39,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:39,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:39,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:57:39,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:39,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:39,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:39,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:57:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:39,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212610981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:39,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:39,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 14:57:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993926355] [2021-06-05 14:57:39,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:57:39,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:57:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:39,888 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:41,081 INFO L93 Difference]: Finished difference Result 2144 states and 5261 transitions. [2021-06-05 14:57:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:57:41,081 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:41,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:41,083 INFO L225 Difference]: With dead ends: 2144 [2021-06-05 14:57:41,084 INFO L226 Difference]: Without dead ends: 2135 [2021-06-05 14:57:41,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 747.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:57:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-06-05 14:57:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 846. [2021-06-05 14:57:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3775147928994085) internal successors, (2009), 845 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2009 transitions. [2021-06-05 14:57:41,095 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2009 transitions. Word has length 29 [2021-06-05 14:57:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:41,095 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2009 transitions. [2021-06-05 14:57:41,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2009 transitions. [2021-06-05 14:57:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:41,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:41,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:41,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 14:57:41,297 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1835199664, now seen corresponding path program 35 times [2021-06-05 14:57:41,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:41,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362016903] [2021-06-05 14:57:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:41,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362016903] [2021-06-05 14:57:41,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362016903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477639352] [2021-06-05 14:57:41,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:41,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:57:41,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:41,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:57:41,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:41,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:57:41,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:57:41,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:41,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:41,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:41,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:41,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477639352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:41,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:41,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:57:41,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023857363] [2021-06-05 14:57:41,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:57:41,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:41,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:57:41,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:57:41,760 INFO L87 Difference]: Start difference. First operand 846 states and 2009 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:42,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:42,603 INFO L93 Difference]: Finished difference Result 2161 states and 5322 transitions. [2021-06-05 14:57:42,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:57:42,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:42,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:42,605 INFO L225 Difference]: With dead ends: 2161 [2021-06-05 14:57:42,605 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 14:57:42,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 710.7ms TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:57:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 14:57:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 858. [2021-06-05 14:57:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.379229871645274) internal successors, (2039), 857 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:42,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2039 transitions. [2021-06-05 14:57:42,618 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2039 transitions. Word has length 29 [2021-06-05 14:57:42,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:42,618 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2039 transitions. [2021-06-05 14:57:42,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2039 transitions. [2021-06-05 14:57:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:42,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:42,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:42,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 14:57:42,820 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1169996496, now seen corresponding path program 36 times [2021-06-05 14:57:42,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:42,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346584581] [2021-06-05 14:57:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:43,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:43,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346584581] [2021-06-05 14:57:43,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346584581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:43,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888727267] [2021-06-05 14:57:43,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:43,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:57:43,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:57:43,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:57:43,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:43,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:43,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:43,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:43,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888727267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:43,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:43,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:57:43,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577373008] [2021-06-05 14:57:43,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:57:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:57:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:57:43,245 INFO L87 Difference]: Start difference. First operand 858 states and 2039 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:44,049 INFO L93 Difference]: Finished difference Result 2231 states and 5485 transitions. [2021-06-05 14:57:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:57:44,049 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:44,051 INFO L225 Difference]: With dead ends: 2231 [2021-06-05 14:57:44,051 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 14:57:44,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 676.6ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:57:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 14:57:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 837. [2021-06-05 14:57:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.374401913875598) internal successors, (1985), 836 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1985 transitions. [2021-06-05 14:57:44,063 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1985 transitions. Word has length 29 [2021-06-05 14:57:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:44,063 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 1985 transitions. [2021-06-05 14:57:44,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1985 transitions. [2021-06-05 14:57:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:44,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:44,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:44,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 14:57:44,281 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash -476095038, now seen corresponding path program 37 times [2021-06-05 14:57:44,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:44,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382971394] [2021-06-05 14:57:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:44,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:44,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382971394] [2021-06-05 14:57:44,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382971394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:44,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496894120] [2021-06-05 14:57:44,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:44,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:44,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:44,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:57:44,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:57:44,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:44,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:44,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:44,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:44,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496894120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:44,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:44,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:57:44,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576046075] [2021-06-05 14:57:44,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:57:44,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:57:44,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:44,725 INFO L87 Difference]: Start difference. First operand 837 states and 1985 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:45,864 INFO L93 Difference]: Finished difference Result 2169 states and 5328 transitions. [2021-06-05 14:57:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:57:45,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:45,866 INFO L225 Difference]: With dead ends: 2169 [2021-06-05 14:57:45,866 INFO L226 Difference]: Without dead ends: 2158 [2021-06-05 14:57:45,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 817.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:57:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-06-05 14:57:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 858. [2021-06-05 14:57:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.379229871645274) internal successors, (2039), 857 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2039 transitions. [2021-06-05 14:57:45,879 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2039 transitions. Word has length 29 [2021-06-05 14:57:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:45,879 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2039 transitions. [2021-06-05 14:57:45,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2039 transitions. [2021-06-05 14:57:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:45,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:45,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:46,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 14:57:46,089 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:46,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1280306012, now seen corresponding path program 38 times [2021-06-05 14:57:46,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:46,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973079280] [2021-06-05 14:57:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:46,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:46,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973079280] [2021-06-05 14:57:46,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973079280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:46,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370263190] [2021-06-05 14:57:46,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:46,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:46,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:46,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:57:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:46,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:57:46,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:46,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:46,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:46,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:57:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:46,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370263190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:46,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:46,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:57:46,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723898887] [2021-06-05 14:57:46,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:57:46,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:46,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:57:46,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:46,526 INFO L87 Difference]: Start difference. First operand 858 states and 2039 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:47,451 INFO L93 Difference]: Finished difference Result 2228 states and 5468 transitions. [2021-06-05 14:57:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:57:47,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:47,454 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 14:57:47,454 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 14:57:47,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 853.4ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:57:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 14:57:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 846. [2021-06-05 14:57:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3763313609467454) internal successors, (2008), 845 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2008 transitions. [2021-06-05 14:57:47,468 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2008 transitions. Word has length 29 [2021-06-05 14:57:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:47,468 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2008 transitions. [2021-06-05 14:57:47,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2008 transitions. [2021-06-05 14:57:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:47,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:47,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:47,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:47,689 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1485707216, now seen corresponding path program 39 times [2021-06-05 14:57:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:47,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165245268] [2021-06-05 14:57:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:48,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:48,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165245268] [2021-06-05 14:57:48,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165245268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:48,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972156628] [2021-06-05 14:57:48,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:57:48,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:57:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:48,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:57:48,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:48,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:48,461 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 23 treesize of output 39 [2021-06-05 14:57:48,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:57:48,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:48,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:48,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:219 [2021-06-05 14:57:48,668 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 14:57:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:48,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972156628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:48,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:48,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 14:57:48,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583469205] [2021-06-05 14:57:48,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:57:48,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:57:48,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:57:48,858 INFO L87 Difference]: Start difference. First operand 846 states and 2008 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:51,659 INFO L93 Difference]: Finished difference Result 2109 states and 5107 transitions. [2021-06-05 14:57:51,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:57:51,659 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:51,661 INFO L225 Difference]: With dead ends: 2109 [2021-06-05 14:57:51,661 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 14:57:51,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2393.3ms TimeCoverageRelationStatistics Valid=444, Invalid=2526, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 14:57:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 14:57:51,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 860. [2021-06-05 14:57:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.3818393480791618) internal successors, (2046), 859 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2046 transitions. [2021-06-05 14:57:51,680 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2046 transitions. Word has length 29 [2021-06-05 14:57:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:51,681 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2046 transitions. [2021-06-05 14:57:51,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2046 transitions. [2021-06-05 14:57:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:51,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:51,682 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:51,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:51,899 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:51,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1983699818, now seen corresponding path program 40 times [2021-06-05 14:57:51,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:51,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487200860] [2021-06-05 14:57:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:52,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:52,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487200860] [2021-06-05 14:57:52,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487200860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:52,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695319113] [2021-06-05 14:57:52,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:52,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:52,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:52,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:52,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:52,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:57:52,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:57:52,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:52,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:52,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:52,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:52,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695319113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:52,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:52,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:57:52,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484725846] [2021-06-05 14:57:52,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:57:52,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:52,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:57:52,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:52,337 INFO L87 Difference]: Start difference. First operand 860 states and 2046 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:53,320 INFO L93 Difference]: Finished difference Result 2351 states and 5789 transitions. [2021-06-05 14:57:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:57:53,321 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:53,323 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 14:57:53,323 INFO L226 Difference]: Without dead ends: 2340 [2021-06-05 14:57:53,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:57:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-06-05 14:57:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 894. [2021-06-05 14:57:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 2.3919372900335945) internal successors, (2136), 893 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2136 transitions. [2021-06-05 14:57:53,336 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2136 transitions. Word has length 29 [2021-06-05 14:57:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:53,336 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 2136 transitions. [2021-06-05 14:57:53,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2136 transitions. [2021-06-05 14:57:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:53,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:53,337 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:53,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:53,553 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash -227298768, now seen corresponding path program 41 times [2021-06-05 14:57:53,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:53,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230001510] [2021-06-05 14:57:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:53,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:53,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230001510] [2021-06-05 14:57:53,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230001510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:53,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308588333] [2021-06-05 14:57:53,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:53,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:57:53,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:53,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:57:53,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:57:53,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:57:53,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:53,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:53,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:53,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:57:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:53,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308588333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:53,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:53,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:57:53,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173272276] [2021-06-05 14:57:53,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:57:53,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:53,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:57:53,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:53,955 INFO L87 Difference]: Start difference. First operand 894 states and 2136 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:54,979 INFO L93 Difference]: Finished difference Result 2421 states and 5936 transitions. [2021-06-05 14:57:54,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:57:54,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:54,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:54,981 INFO L225 Difference]: With dead ends: 2421 [2021-06-05 14:57:54,981 INFO L226 Difference]: Without dead ends: 2401 [2021-06-05 14:57:54,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 833.1ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:57:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-06-05 14:57:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 869. [2021-06-05 14:57:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.3847926267281108) internal successors, (2070), 868 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2070 transitions. [2021-06-05 14:57:54,994 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2070 transitions. Word has length 29 [2021-06-05 14:57:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:54,994 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2070 transitions. [2021-06-05 14:57:54,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2070 transitions. [2021-06-05 14:57:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:54,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:54,995 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:55,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:55,196 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:55,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1798638680, now seen corresponding path program 42 times [2021-06-05 14:57:55,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:55,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244399553] [2021-06-05 14:57:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:55,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:55,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244399553] [2021-06-05 14:57:55,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244399553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:55,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753109151] [2021-06-05 14:57:55,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:55,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:57:55,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:55,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:57:55,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:55,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:55,671 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 23 treesize of output 39 [2021-06-05 14:57:55,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:57:55,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:55,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:55,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:168 [2021-06-05 14:57:55,856 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-05 14:57:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:56,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753109151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:56,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:56,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 14:57:56,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482996408] [2021-06-05 14:57:56,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:57:56,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:56,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:57:56,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:57:56,025 INFO L87 Difference]: Start difference. First operand 869 states and 2070 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:58,949 INFO L93 Difference]: Finished difference Result 2307 states and 5553 transitions. [2021-06-05 14:57:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 14:57:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:57:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:58,952 INFO L225 Difference]: With dead ends: 2307 [2021-06-05 14:57:58,952 INFO L226 Difference]: Without dead ends: 2271 [2021-06-05 14:57:58,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 2368.9ms TimeCoverageRelationStatistics Valid=535, Invalid=3247, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 14:57:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-06-05 14:57:58,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 866. [2021-06-05 14:57:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.3815028901734103) internal successors, (2060), 865 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2060 transitions. [2021-06-05 14:57:58,965 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2060 transitions. Word has length 29 [2021-06-05 14:57:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:58,965 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2060 transitions. [2021-06-05 14:57:58,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2060 transitions. [2021-06-05 14:57:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:57:58,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:58,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:59,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 14:57:59,181 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1183083592, now seen corresponding path program 43 times [2021-06-05 14:57:59,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:59,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382603715] [2021-06-05 14:57:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:59,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:59,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382603715] [2021-06-05 14:57:59,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382603715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:59,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039362133] [2021-06-05 14:57:59,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:57:59,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:57:59,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:59,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:59,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:59,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:57:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:59,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039362133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:59,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:59,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:57:59,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145067234] [2021-06-05 14:57:59,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:57:59,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:59,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:57:59,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:57:59,602 INFO L87 Difference]: Start difference. First operand 866 states and 2060 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:00,347 INFO L93 Difference]: Finished difference Result 1983 states and 4808 transitions. [2021-06-05 14:58:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:58:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:00,349 INFO L225 Difference]: With dead ends: 1983 [2021-06-05 14:58:00,349 INFO L226 Difference]: Without dead ends: 1973 [2021-06-05 14:58:00,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 596.0ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:58:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-05 14:58:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 861. [2021-06-05 14:58:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.3813953488372093) internal successors, (2048), 860 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2048 transitions. [2021-06-05 14:58:00,361 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2048 transitions. Word has length 29 [2021-06-05 14:58:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:00,361 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2048 transitions. [2021-06-05 14:58:00,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2048 transitions. [2021-06-05 14:58:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:00,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:00,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:00,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:00,573 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash 123407448, now seen corresponding path program 44 times [2021-06-05 14:58:00,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:00,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230480966] [2021-06-05 14:58:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:00,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:00,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230480966] [2021-06-05 14:58:00,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230480966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:00,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862854484] [2021-06-05 14:58:00,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:00,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:00,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:00,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:01,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 14:58:01,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:01,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:01,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:01,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 14:58:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:01,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862854484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:01,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:01,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:01,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920962808] [2021-06-05 14:58:01,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:01,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:01,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:01,042 INFO L87 Difference]: Start difference. First operand 861 states and 2048 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:02,302 INFO L93 Difference]: Finished difference Result 2000 states and 4855 transitions. [2021-06-05 14:58:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:58:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:02,304 INFO L225 Difference]: With dead ends: 2000 [2021-06-05 14:58:02,304 INFO L226 Difference]: Without dead ends: 1977 [2021-06-05 14:58:02,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 996.4ms TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:58:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-06-05 14:58:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 842. [2021-06-05 14:58:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.3769322235434007) internal successors, (1999), 841 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1999 transitions. [2021-06-05 14:58:02,315 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1999 transitions. Word has length 29 [2021-06-05 14:58:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:02,315 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 1999 transitions. [2021-06-05 14:58:02,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1999 transitions. [2021-06-05 14:58:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:02,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:02,316 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:02,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 14:58:02,517 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:02,517 INFO L82 PathProgramCache]: Analyzing trace with hash -644766292, now seen corresponding path program 45 times [2021-06-05 14:58:02,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:02,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134712943] [2021-06-05 14:58:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:02,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134712943] [2021-06-05 14:58:02,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134712943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661702339] [2021-06-05 14:58:02,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:02,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:02,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:02,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:02,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 14:58:02,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:02,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:02,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:02,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 14:58:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:02,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661702339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:02,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:02,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:02,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809527876] [2021-06-05 14:58:02,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:02,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:02,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:02,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:02,970 INFO L87 Difference]: Start difference. First operand 842 states and 1999 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:04,469 INFO L93 Difference]: Finished difference Result 2007 states and 4906 transitions. [2021-06-05 14:58:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:58:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:58:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:04,471 INFO L225 Difference]: With dead ends: 2007 [2021-06-05 14:58:04,471 INFO L226 Difference]: Without dead ends: 1990 [2021-06-05 14:58:04,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1055.8ms TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:58:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-06-05 14:58:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 863. [2021-06-05 14:58:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.3781902552204177) internal successors, (2050), 862 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2050 transitions. [2021-06-05 14:58:04,483 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2050 transitions. Word has length 29 [2021-06-05 14:58:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:04,483 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2050 transitions. [2021-06-05 14:58:04,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2050 transitions. [2021-06-05 14:58:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:04,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:04,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:04,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:04,699 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:04,700 INFO L82 PathProgramCache]: Analyzing trace with hash -371094554, now seen corresponding path program 46 times [2021-06-05 14:58:04,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:04,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5445120] [2021-06-05 14:58:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:04,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:04,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5445120] [2021-06-05 14:58:04,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5445120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:04,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285542790] [2021-06-05 14:58:04,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:58:04,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:04,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:04,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:04,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:05,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:05,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:58:05,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:05,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:05,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:05,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:58:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:05,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285542790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:05,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:05,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:05,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770610370] [2021-06-05 14:58:05,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:05,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:05,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:05,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:05,180 INFO L87 Difference]: Start difference. First operand 863 states and 2050 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:06,922 INFO L93 Difference]: Finished difference Result 2520 states and 6189 transitions. [2021-06-05 14:58:06,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:58:06,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:06,925 INFO L225 Difference]: With dead ends: 2520 [2021-06-05 14:58:06,925 INFO L226 Difference]: Without dead ends: 2505 [2021-06-05 14:58:06,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1458.8ms TimeCoverageRelationStatistics Valid=495, Invalid=2157, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:58:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-06-05 14:58:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 875. [2021-06-05 14:58:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3787185354691074) internal successors, (2079), 874 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2079 transitions. [2021-06-05 14:58:06,938 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2079 transitions. Word has length 29 [2021-06-05 14:58:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:06,938 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2079 transitions. [2021-06-05 14:58:06,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2079 transitions. [2021-06-05 14:58:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:06,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:06,940 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:07,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 14:58:07,140 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:07,140 INFO L82 PathProgramCache]: Analyzing trace with hash 294108614, now seen corresponding path program 47 times [2021-06-05 14:58:07,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:07,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948435438] [2021-06-05 14:58:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:07,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:07,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948435438] [2021-06-05 14:58:07,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948435438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:07,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360204239] [2021-06-05 14:58:07,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:07,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:58:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:07,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:07,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:07,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:07,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:58:07,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:07,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:07,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:07,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:58:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:07,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360204239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:07,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:07,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:58:07,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200140031] [2021-06-05 14:58:07,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:58:07,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:07,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:58:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:07,559 INFO L87 Difference]: Start difference. First operand 875 states and 2079 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:08,845 INFO L93 Difference]: Finished difference Result 2125 states and 5209 transitions. [2021-06-05 14:58:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:58:08,846 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:08,848 INFO L225 Difference]: With dead ends: 2125 [2021-06-05 14:58:08,848 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 14:58:08,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 966.3ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:58:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 14:58:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 864. [2021-06-05 14:58:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.3800695249130936) internal successors, (2054), 863 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2054 transitions. [2021-06-05 14:58:08,859 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2054 transitions. Word has length 29 [2021-06-05 14:58:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:08,859 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2054 transitions. [2021-06-05 14:58:08,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2054 transitions. [2021-06-05 14:58:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:08,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:08,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:09,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 14:58:09,062 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:09,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1194528790, now seen corresponding path program 48 times [2021-06-05 14:58:09,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:09,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810378732] [2021-06-05 14:58:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:09,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:09,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810378732] [2021-06-05 14:58:09,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810378732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:09,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308373338] [2021-06-05 14:58:09,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:09,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:58:09,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:09,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:09,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:09,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:09,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:09,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:09,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:09,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:58:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:09,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308373338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:09,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:09,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:58:09,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943508634] [2021-06-05 14:58:09,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:58:09,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:09,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:58:09,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:58:09,455 INFO L87 Difference]: Start difference. First operand 864 states and 2054 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:10,587 INFO L93 Difference]: Finished difference Result 2623 states and 6537 transitions. [2021-06-05 14:58:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:58:10,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:10,590 INFO L225 Difference]: With dead ends: 2623 [2021-06-05 14:58:10,590 INFO L226 Difference]: Without dead ends: 2610 [2021-06-05 14:58:10,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 912.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:58:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2021-06-05 14:58:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 882. [2021-06-05 14:58:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.383654937570942) internal successors, (2100), 881 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2100 transitions. [2021-06-05 14:58:10,603 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2100 transitions. Word has length 29 [2021-06-05 14:58:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:10,603 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2100 transitions. [2021-06-05 14:58:10,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2100 transitions. [2021-06-05 14:58:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:10,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:10,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:10,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 14:58:10,805 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:10,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:10,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1344037456, now seen corresponding path program 49 times [2021-06-05 14:58:10,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:10,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658216577] [2021-06-05 14:58:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:11,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:11,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658216577] [2021-06-05 14:58:11,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658216577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:11,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138088555] [2021-06-05 14:58:11,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:11,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:11,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:11,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:11,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:11,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:11,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:11,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:58:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:11,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138088555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:11,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:11,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:58:11,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450048411] [2021-06-05 14:58:11,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:58:11,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:11,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:58:11,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:58:11,179 INFO L87 Difference]: Start difference. First operand 882 states and 2100 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:12,149 INFO L93 Difference]: Finished difference Result 2328 states and 5765 transitions. [2021-06-05 14:58:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:58:12,150 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:12,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:12,152 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 14:58:12,152 INFO L226 Difference]: Without dead ends: 2311 [2021-06-05 14:58:12,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 847.1ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:58:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-06-05 14:58:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 868. [2021-06-05 14:58:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.3829296424452133) internal successors, (2066), 867 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2066 transitions. [2021-06-05 14:58:12,164 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2066 transitions. Word has length 29 [2021-06-05 14:58:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:12,164 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2066 transitions. [2021-06-05 14:58:12,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2066 transitions. [2021-06-05 14:58:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:12,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:12,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:12,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 14:58:12,369 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash 184916612, now seen corresponding path program 50 times [2021-06-05 14:58:12,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:12,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425764225] [2021-06-05 14:58:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:12,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:12,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425764225] [2021-06-05 14:58:12,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425764225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:12,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628890581] [2021-06-05 14:58:12,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:12,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:12,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:12,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:12,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:12,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:12,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:12,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:58:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:12,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628890581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:12,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:12,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 14:58:12,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380386127] [2021-06-05 14:58:12,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:58:12,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:12,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:58:12,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:12,802 INFO L87 Difference]: Start difference. First operand 868 states and 2066 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:13,759 INFO L93 Difference]: Finished difference Result 2109 states and 5162 transitions. [2021-06-05 14:58:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:58:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:13,762 INFO L225 Difference]: With dead ends: 2109 [2021-06-05 14:58:13,762 INFO L226 Difference]: Without dead ends: 2099 [2021-06-05 14:58:13,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:58:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-05 14:58:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 857. [2021-06-05 14:58:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.3773364485981308) internal successors, (2035), 856 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2035 transitions. [2021-06-05 14:58:13,773 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2035 transitions. Word has length 29 [2021-06-05 14:58:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:13,773 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2035 transitions. [2021-06-05 14:58:13,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2035 transitions. [2021-06-05 14:58:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:13,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:13,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:13,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:13,975 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash -989153706, now seen corresponding path program 51 times [2021-06-05 14:58:13,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:13,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388500459] [2021-06-05 14:58:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:14,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:14,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388500459] [2021-06-05 14:58:14,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388500459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:14,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129613389] [2021-06-05 14:58:14,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:14,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:14,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:14,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:14,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:14,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:14,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:14,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:14,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:14,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:58:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:14,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129613389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:14,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:14,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:14,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250342943] [2021-06-05 14:58:14,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:14,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:14,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:14,415 INFO L87 Difference]: Start difference. First operand 857 states and 2035 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:16,019 INFO L93 Difference]: Finished difference Result 2191 states and 5325 transitions. [2021-06-05 14:58:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:58:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:58:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:16,022 INFO L225 Difference]: With dead ends: 2191 [2021-06-05 14:58:16,022 INFO L226 Difference]: Without dead ends: 2174 [2021-06-05 14:58:16,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1064.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:58:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-06-05 14:58:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 875. [2021-06-05 14:58:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3821510297482837) internal successors, (2082), 874 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2082 transitions. [2021-06-05 14:58:16,034 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2082 transitions. Word has length 29 [2021-06-05 14:58:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:16,034 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2082 transitions. [2021-06-05 14:58:16,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2082 transitions. [2021-06-05 14:58:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:16,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:16,035 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:16,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 14:58:16,235 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash -715481968, now seen corresponding path program 52 times [2021-06-05 14:58:16,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:16,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159723371] [2021-06-05 14:58:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:16,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:16,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159723371] [2021-06-05 14:58:16,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159723371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:16,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367648912] [2021-06-05 14:58:16,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:16,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:16,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:16,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:16,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:16,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:16,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:16,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:16,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:58:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:16,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367648912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:16,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:16,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:16,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173696821] [2021-06-05 14:58:16,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:16,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:16,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:16,663 INFO L87 Difference]: Start difference. First operand 875 states and 2082 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:18,348 INFO L93 Difference]: Finished difference Result 2635 states and 6476 transitions. [2021-06-05 14:58:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:58:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:18,351 INFO L225 Difference]: With dead ends: 2635 [2021-06-05 14:58:18,351 INFO L226 Difference]: Without dead ends: 2622 [2021-06-05 14:58:18,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1389.8ms TimeCoverageRelationStatistics Valid=481, Invalid=2069, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:58:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-06-05 14:58:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 891. [2021-06-05 14:58:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.385393258426966) internal successors, (2123), 890 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2123 transitions. [2021-06-05 14:58:18,364 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2123 transitions. Word has length 29 [2021-06-05 14:58:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:18,364 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 2123 transitions. [2021-06-05 14:58:18,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2123 transitions. [2021-06-05 14:58:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:18,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:18,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:18,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 14:58:18,566 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:18,566 INFO L82 PathProgramCache]: Analyzing trace with hash -50278800, now seen corresponding path program 53 times [2021-06-05 14:58:18,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:18,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005445912] [2021-06-05 14:58:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:18,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:18,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005445912] [2021-06-05 14:58:18,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005445912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:18,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537472633] [2021-06-05 14:58:18,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:18,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:58:18,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:18,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:18,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:18,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:58:18,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:18,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:18,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:18,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:58:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:19,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537472633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:19,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:19,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:58:19,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130657597] [2021-06-05 14:58:19,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:58:19,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:19,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:58:19,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:19,003 INFO L87 Difference]: Start difference. First operand 891 states and 2123 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:20,165 INFO L93 Difference]: Finished difference Result 2228 states and 5467 transitions. [2021-06-05 14:58:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:58:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:20,167 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 14:58:20,167 INFO L226 Difference]: Without dead ends: 2210 [2021-06-05 14:58:20,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 857.3ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:58:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-06-05 14:58:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 864. [2021-06-05 14:58:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.381228273464658) internal successors, (2055), 863 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2055 transitions. [2021-06-05 14:58:20,179 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2055 transitions. Word has length 29 [2021-06-05 14:58:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:20,179 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2055 transitions. [2021-06-05 14:58:20,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2055 transitions. [2021-06-05 14:58:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:20,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:20,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:20,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:20,385 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1301042010, now seen corresponding path program 54 times [2021-06-05 14:58:20,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:20,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441269578] [2021-06-05 14:58:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:20,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:20,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441269578] [2021-06-05 14:58:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441269578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:20,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494395283] [2021-06-05 14:58:20,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:20,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:58:20,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:20,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:20,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:20,817 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 14:58:20,818 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-06-05 14:58:20,820 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:20,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:20,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:20,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-06-05 14:58:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:20,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494395283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:20,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:20,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:20,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159095644] [2021-06-05 14:58:20,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:20,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:20,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:20,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:20,857 INFO L87 Difference]: Start difference. First operand 864 states and 2055 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:21,790 INFO L93 Difference]: Finished difference Result 2015 states and 4908 transitions. [2021-06-05 14:58:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:58:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:58:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:21,793 INFO L225 Difference]: With dead ends: 2015 [2021-06-05 14:58:21,793 INFO L226 Difference]: Without dead ends: 2006 [2021-06-05 14:58:21,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 725.5ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:58:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-06-05 14:58:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 866. [2021-06-05 14:58:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.3791907514450865) internal successors, (2058), 865 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2058 transitions. [2021-06-05 14:58:21,804 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2058 transitions. Word has length 29 [2021-06-05 14:58:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:21,804 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2058 transitions. [2021-06-05 14:58:21,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2058 transitions. [2021-06-05 14:58:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:21,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:21,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:22,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:22,013 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash 880815196, now seen corresponding path program 55 times [2021-06-05 14:58:22,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:22,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475151835] [2021-06-05 14:58:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:22,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:22,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475151835] [2021-06-05 14:58:22,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475151835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:22,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216348391] [2021-06-05 14:58:22,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:22,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 14:58:22,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:22,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:22,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:22,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 14:58:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:22,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216348391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:22,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:22,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:22,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178960422] [2021-06-05 14:58:22,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:22,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:22,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:22,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:22,444 INFO L87 Difference]: Start difference. First operand 866 states and 2058 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:23,244 INFO L93 Difference]: Finished difference Result 2129 states and 5184 transitions. [2021-06-05 14:58:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:58:23,245 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:58:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:23,247 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 14:58:23,247 INFO L226 Difference]: Without dead ends: 2120 [2021-06-05 14:58:23,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 593.8ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:58:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-06-05 14:58:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 902. [2021-06-05 14:58:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-06-05 14:58:23,258 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-06-05 14:58:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:23,258 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-06-05 14:58:23,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-06-05 14:58:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:23,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:23,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:23,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:23,475 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:23,475 INFO L82 PathProgramCache]: Analyzing trace with hash 591087582, now seen corresponding path program 56 times [2021-06-05 14:58:23,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:23,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523392668] [2021-06-05 14:58:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:23,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:23,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523392668] [2021-06-05 14:58:23,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523392668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:23,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303962312] [2021-06-05 14:58:23,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:23,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:23,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:23,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:23,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:23,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 14:58:23,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:23,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:23,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:23,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 14:58:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:23,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303962312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:23,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:23,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:23,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308775759] [2021-06-05 14:58:23,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:23,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:23,946 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:25,058 INFO L93 Difference]: Finished difference Result 2272 states and 5520 transitions. [2021-06-05 14:58:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:58:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:58:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:25,061 INFO L225 Difference]: With dead ends: 2272 [2021-06-05 14:58:25,061 INFO L226 Difference]: Without dead ends: 2255 [2021-06-05 14:58:25,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 767.7ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:58:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-06-05 14:58:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 920. [2021-06-05 14:58:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.381936887921654) internal successors, (2189), 919 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2189 transitions. [2021-06-05 14:58:25,073 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2189 transitions. Word has length 29 [2021-06-05 14:58:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:25,073 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2189 transitions. [2021-06-05 14:58:25,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2189 transitions. [2021-06-05 14:58:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:25,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:25,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:25,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-06-05 14:58:25,275 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1810375108, now seen corresponding path program 57 times [2021-06-05 14:58:25,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:25,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842055516] [2021-06-05 14:58:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:25,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:25,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842055516] [2021-06-05 14:58:25,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842055516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:25,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503863107] [2021-06-05 14:58:25,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:25,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:25,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:25,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:25,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:25,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:58:25,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:25,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:25,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:25,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:58:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:25,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503863107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:25,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:25,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:25,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545930042] [2021-06-05 14:58:25,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:25,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:25,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:25,779 INFO L87 Difference]: Start difference. First operand 920 states and 2189 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:27,047 INFO L93 Difference]: Finished difference Result 2706 states and 6630 transitions. [2021-06-05 14:58:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:58:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:27,050 INFO L225 Difference]: With dead ends: 2706 [2021-06-05 14:58:27,051 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 14:58:27,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 952.7ms TimeCoverageRelationStatistics Valid=357, Invalid=1283, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:58:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 14:58:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 936. [2021-06-05 14:58:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 2.3850267379679146) internal successors, (2230), 935 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2230 transitions. [2021-06-05 14:58:27,064 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2230 transitions. Word has length 29 [2021-06-05 14:58:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:27,064 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 2230 transitions. [2021-06-05 14:58:27,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2230 transitions. [2021-06-05 14:58:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:27,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:27,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:27,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 14:58:27,280 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1145171940, now seen corresponding path program 58 times [2021-06-05 14:58:27,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:27,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590904794] [2021-06-05 14:58:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:27,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:27,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590904794] [2021-06-05 14:58:27,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590904794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:27,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291540208] [2021-06-05 14:58:27,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:27,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:27,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:27,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:27,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:58:27,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:27,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:27,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:27,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:58:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:27,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291540208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:27,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:27,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:58:27,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198827735] [2021-06-05 14:58:27,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:58:27,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:27,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:58:27,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:27,663 INFO L87 Difference]: Start difference. First operand 936 states and 2230 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:28,623 INFO L93 Difference]: Finished difference Result 2285 states and 5602 transitions. [2021-06-05 14:58:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:58:28,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:28,626 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 14:58:28,626 INFO L226 Difference]: Without dead ends: 2267 [2021-06-05 14:58:28,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 704.8ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:58:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-06-05 14:58:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 905. [2021-06-05 14:58:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-06-05 14:58:28,638 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-06-05 14:58:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:28,638 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-06-05 14:58:28,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-06-05 14:58:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:28,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:28,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:28,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 14:58:28,840 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash -681846126, now seen corresponding path program 59 times [2021-06-05 14:58:28,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:28,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294473326] [2021-06-05 14:58:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:29,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:29,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294473326] [2021-06-05 14:58:29,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294473326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:29,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047048393] [2021-06-05 14:58:29,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:29,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:58:29,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:29,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:29,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:29,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:29,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:29,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:29,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:29,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:58:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:29,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047048393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:29,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:29,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:29,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415032433] [2021-06-05 14:58:29,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:29,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:29,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:29,256 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:30,103 INFO L93 Difference]: Finished difference Result 2101 states and 5115 transitions. [2021-06-05 14:58:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:58:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:58:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:30,106 INFO L225 Difference]: With dead ends: 2101 [2021-06-05 14:58:30,106 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 14:58:30,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:58:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 14:58:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 902. [2021-06-05 14:58:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-06-05 14:58:30,117 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-06-05 14:58:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:30,118 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-06-05 14:58:30,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-06-05 14:58:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:30,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:30,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:30,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 14:58:30,333 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:30,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2034498886, now seen corresponding path program 60 times [2021-06-05 14:58:30,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:30,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541643382] [2021-06-05 14:58:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:30,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:30,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541643382] [2021-06-05 14:58:30,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541643382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:30,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038709228] [2021-06-05 14:58:30,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:30,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:58:30,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:30,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:58:30,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:30,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:30,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:30,747 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 25 treesize of output 33 [2021-06-05 14:58:30,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:58:30,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:30,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:30,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:52 [2021-06-05 14:58:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:30,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038709228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:30,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:30,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 14:58:30,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315650080] [2021-06-05 14:58:30,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:58:30,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:30,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:58:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:58:30,863 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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) [2021-06-05 14:58:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:32,549 INFO L93 Difference]: Finished difference Result 2312 states and 5639 transitions. [2021-06-05 14:58:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:58:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 29 [2021-06-05 14:58:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:32,551 INFO L225 Difference]: With dead ends: 2312 [2021-06-05 14:58:32,551 INFO L226 Difference]: Without dead ends: 2297 [2021-06-05 14:58:32,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1501.9ms TimeCoverageRelationStatistics Valid=404, Invalid=1758, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:58:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-05 14:58:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 919. [2021-06-05 14:58:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.3823529411764706) internal successors, (2187), 918 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2187 transitions. [2021-06-05 14:58:32,563 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2187 transitions. Word has length 29 [2021-06-05 14:58:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:32,563 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2187 transitions. [2021-06-05 14:58:32,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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) [2021-06-05 14:58:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2187 transitions. [2021-06-05 14:58:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:32,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:32,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:32,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 14:58:32,765 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:32,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1760827148, now seen corresponding path program 61 times [2021-06-05 14:58:32,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:32,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337068177] [2021-06-05 14:58:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:32,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:32,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337068177] [2021-06-05 14:58:32,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337068177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:32,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859367316] [2021-06-05 14:58:32,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:33,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:33,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:33,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:58:33,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:33,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:33,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:33,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:58:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:33,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859367316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:33,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:33,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:33,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551618902] [2021-06-05 14:58:33,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:33,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:33,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:33,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:33,217 INFO L87 Difference]: Start difference. First operand 919 states and 2187 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:34,878 INFO L93 Difference]: Finished difference Result 2639 states and 6483 transitions. [2021-06-05 14:58:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:58:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:34,881 INFO L225 Difference]: With dead ends: 2639 [2021-06-05 14:58:34,881 INFO L226 Difference]: Without dead ends: 2624 [2021-06-05 14:58:34,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1254.8ms TimeCoverageRelationStatistics Valid=428, Invalid=1734, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:58:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-06-05 14:58:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 952. [2021-06-05 14:58:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 2.3880126182965298) internal successors, (2271), 951 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 2271 transitions. [2021-06-05 14:58:34,894 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 2271 transitions. Word has length 29 [2021-06-05 14:58:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:34,894 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 2271 transitions. [2021-06-05 14:58:34,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 2271 transitions. [2021-06-05 14:58:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:34,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:34,895 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:35,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:35,096 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1095623980, now seen corresponding path program 62 times [2021-06-05 14:58:35,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:35,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796178052] [2021-06-05 14:58:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:35,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796178052] [2021-06-05 14:58:35,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796178052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452529739] [2021-06-05 14:58:35,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:35,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:35,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:35,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:35,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:35,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:58:35,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:35,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:35,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:35,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:58:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:35,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452529739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:35,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:35,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:58:35,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063884715] [2021-06-05 14:58:35,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:58:35,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:35,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:58:35,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:35,503 INFO L87 Difference]: Start difference. First operand 952 states and 2271 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:36,564 INFO L93 Difference]: Finished difference Result 2233 states and 5482 transitions. [2021-06-05 14:58:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:58:36,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:36,567 INFO L225 Difference]: With dead ends: 2233 [2021-06-05 14:58:36,567 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 14:58:36,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 782.5ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:58:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 14:58:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 931. [2021-06-05 14:58:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.3849462365591396) internal successors, (2218), 930 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2218 transitions. [2021-06-05 14:58:36,580 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2218 transitions. Word has length 29 [2021-06-05 14:58:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:36,580 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2218 transitions. [2021-06-05 14:58:36,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2218 transitions. [2021-06-05 14:58:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:36,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:36,581 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:36,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:36,787 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:36,787 INFO L82 PathProgramCache]: Analyzing trace with hash -195203804, now seen corresponding path program 63 times [2021-06-05 14:58:36,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:36,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479541470] [2021-06-05 14:58:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:37,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:37,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479541470] [2021-06-05 14:58:37,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479541470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:37,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529932426] [2021-06-05 14:58:37,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:58:37,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:58:37,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:37,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:37,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:37,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:37,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:37,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:37,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:58:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:37,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529932426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:37,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:37,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:58:37,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364205945] [2021-06-05 14:58:37,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:58:37,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:37,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:58:37,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:58:37,246 INFO L87 Difference]: Start difference. First operand 931 states and 2218 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:38,760 INFO L93 Difference]: Finished difference Result 2734 states and 6808 transitions. [2021-06-05 14:58:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:58:38,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:38,763 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 14:58:38,763 INFO L226 Difference]: Without dead ends: 2721 [2021-06-05 14:58:38,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1178.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:58:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-05 14:58:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 952. [2021-06-05 14:58:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 2.3880126182965298) internal successors, (2271), 951 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 2271 transitions. [2021-06-05 14:58:38,777 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 2271 transitions. Word has length 29 [2021-06-05 14:58:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:38,777 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 2271 transitions. [2021-06-05 14:58:38,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 2271 transitions. [2021-06-05 14:58:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:38,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:38,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:38,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 14:58:38,979 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1561197246, now seen corresponding path program 64 times [2021-06-05 14:58:38,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:38,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75209520] [2021-06-05 14:58:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:39,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:39,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75209520] [2021-06-05 14:58:39,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75209520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:39,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845332059] [2021-06-05 14:58:39,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:39,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:39,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:39,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:58:39,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:39,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:39,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:39,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:58:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:39,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845332059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:39,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:39,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:58:39,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556348782] [2021-06-05 14:58:39,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:58:39,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:39,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:58:39,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:58:39,386 INFO L87 Difference]: Start difference. First operand 952 states and 2271 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:40,795 INFO L93 Difference]: Finished difference Result 2449 states and 6065 transitions. [2021-06-05 14:58:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:58:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:40,798 INFO L225 Difference]: With dead ends: 2449 [2021-06-05 14:58:40,798 INFO L226 Difference]: Without dead ends: 2432 [2021-06-05 14:58:40,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1107.1ms TimeCoverageRelationStatistics Valid=308, Invalid=1414, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:58:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-05 14:58:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 940. [2021-06-05 14:58:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.3876464323748667) internal successors, (2242), 939 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2242 transitions. [2021-06-05 14:58:40,811 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2242 transitions. Word has length 29 [2021-06-05 14:58:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:40,811 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 2242 transitions. [2021-06-05 14:58:40,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2242 transitions. [2021-06-05 14:58:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:40,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:40,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:41,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 14:58:41,012 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:41,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1204815982, now seen corresponding path program 65 times [2021-06-05 14:58:41,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:41,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701664882] [2021-06-05 14:58:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:41,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:41,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701664882] [2021-06-05 14:58:41,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701664882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:41,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359949574] [2021-06-05 14:58:41,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:41,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:58:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:41,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:41,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:41,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:41,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:41,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:41,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:41,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:58:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:41,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359949574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:41,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:41,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 14:58:41,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655933740] [2021-06-05 14:58:41,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:58:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:41,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:58:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:41,444 INFO L87 Difference]: Start difference. First operand 940 states and 2242 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:42,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:42,678 INFO L93 Difference]: Finished difference Result 2213 states and 5429 transitions. [2021-06-05 14:58:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:58:42,678 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:42,680 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 14:58:42,680 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 14:58:42,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 850.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:58:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 14:58:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 925. [2021-06-05 14:58:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.382034632034632) internal successors, (2201), 924 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2201 transitions. [2021-06-05 14:58:42,697 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2201 transitions. Word has length 29 [2021-06-05 14:58:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:42,697 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2201 transitions. [2021-06-05 14:58:42,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2201 transitions. [2021-06-05 14:58:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:42,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:42,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:42,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 14:58:42,913 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:42,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1872493656, now seen corresponding path program 66 times [2021-06-05 14:58:42,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:42,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972954228] [2021-06-05 14:58:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:43,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:43,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972954228] [2021-06-05 14:58:43,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972954228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:43,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886915291] [2021-06-05 14:58:43,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:43,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:58:43,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:43,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:58:43,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:43,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:43,323 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 19 treesize of output 27 [2021-06-05 14:58:43,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:58:43,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:43,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:43,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 14:58:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:43,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886915291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:43,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:43,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 14:58:43,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996939098] [2021-06-05 14:58:43,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:58:43,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:43,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:58:43,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:58:43,463 INFO L87 Difference]: Start difference. First operand 925 states and 2201 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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) [2021-06-05 14:58:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:45,101 INFO L93 Difference]: Finished difference Result 2397 states and 5827 transitions. [2021-06-05 14:58:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:58:45,101 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 29 [2021-06-05 14:58:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:45,103 INFO L225 Difference]: With dead ends: 2397 [2021-06-05 14:58:45,103 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 14:58:45,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1356.6ms TimeCoverageRelationStatistics Valid=406, Invalid=1574, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:58:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 14:58:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 943. [2021-06-05 14:58:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.386411889596603) internal successors, (2248), 942 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2248 transitions. [2021-06-05 14:58:45,122 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2248 transitions. Word has length 29 [2021-06-05 14:58:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:45,122 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 2248 transitions. [2021-06-05 14:58:45,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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) [2021-06-05 14:58:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2248 transitions. [2021-06-05 14:58:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:45,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:45,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:45,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 14:58:45,324 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:45,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1598821918, now seen corresponding path program 67 times [2021-06-05 14:58:45,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:45,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860672643] [2021-06-05 14:58:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:45,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:45,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860672643] [2021-06-05 14:58:45,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860672643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:45,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440790743] [2021-06-05 14:58:45,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:45,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:45,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:45,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:45,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:45,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:45,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:58:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:45,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440790743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:45,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:45,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:45,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719022926] [2021-06-05 14:58:45,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:45,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:45,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:45,767 INFO L87 Difference]: Start difference. First operand 943 states and 2248 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:47,034 INFO L93 Difference]: Finished difference Result 2737 states and 6714 transitions. [2021-06-05 14:58:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:58:47,035 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:47,037 INFO L225 Difference]: With dead ends: 2737 [2021-06-05 14:58:47,037 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 14:58:47,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1046.3ms TimeCoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:58:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 14:58:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 977. [2021-06-05 14:58:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.394467213114754) internal successors, (2337), 976 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2337 transitions. [2021-06-05 14:58:47,051 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2337 transitions. Word has length 29 [2021-06-05 14:58:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:47,051 INFO L482 AbstractCegarLoop]: Abstraction has 977 states and 2337 transitions. [2021-06-05 14:58:47,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2337 transitions. [2021-06-05 14:58:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:47,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:47,052 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:47,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:47,253 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash -933618750, now seen corresponding path program 68 times [2021-06-05 14:58:47,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:47,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004089611] [2021-06-05 14:58:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:47,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004089611] [2021-06-05 14:58:47,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004089611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104106604] [2021-06-05 14:58:47,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:47,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:47,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:47,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:47,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:47,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:47,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:47,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:58:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:47,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104106604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:47,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:47,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:58:47,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136273137] [2021-06-05 14:58:47,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:58:47,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:47,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:58:47,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:47,667 INFO L87 Difference]: Start difference. First operand 977 states and 2337 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:48,639 INFO L93 Difference]: Finished difference Result 2328 states and 5723 transitions. [2021-06-05 14:58:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:58:48,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:48,641 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 14:58:48,641 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 14:58:48,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 767.8ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:58:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 14:58:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 937. [2021-06-05 14:58:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.3846153846153846) internal successors, (2232), 936 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2232 transitions. [2021-06-05 14:58:48,654 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2232 transitions. Word has length 29 [2021-06-05 14:58:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:48,654 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 2232 transitions. [2021-06-05 14:58:48,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2232 transitions. [2021-06-05 14:58:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:48,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:48,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:48,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 14:58:48,856 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2110585336, now seen corresponding path program 69 times [2021-06-05 14:58:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:48,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128746644] [2021-06-05 14:58:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:49,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:49,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128746644] [2021-06-05 14:58:49,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128746644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:49,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090459355] [2021-06-05 14:58:49,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:49,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:49,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:49,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:49,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:49,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:49,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:49,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:58:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:49,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090459355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:49,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:49,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:49,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974007525] [2021-06-05 14:58:49,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:49,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:49,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:49,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:49,277 INFO L87 Difference]: Start difference. First operand 937 states and 2232 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:50,203 INFO L93 Difference]: Finished difference Result 2170 states and 5288 transitions. [2021-06-05 14:58:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:58:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:58:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:50,205 INFO L225 Difference]: With dead ends: 2170 [2021-06-05 14:58:50,205 INFO L226 Difference]: Without dead ends: 2161 [2021-06-05 14:58:50,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:58:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-05 14:58:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 932. [2021-06-05 14:58:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.3845327604726103) internal successors, (2220), 931 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2220 transitions. [2021-06-05 14:58:50,217 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2220 transitions. Word has length 29 [2021-06-05 14:58:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:50,217 INFO L482 AbstractCegarLoop]: Abstraction has 932 states and 2220 transitions. [2021-06-05 14:58:50,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2220 transitions. [2021-06-05 14:58:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:50,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:50,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:50,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 14:58:50,424 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:50,424 INFO L82 PathProgramCache]: Analyzing trace with hash -479580550, now seen corresponding path program 70 times [2021-06-05 14:58:50,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:50,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933839605] [2021-06-05 14:58:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:50,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:50,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933839605] [2021-06-05 14:58:50,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933839605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:50,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456330348] [2021-06-05 14:58:50,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:50,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:50,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:50,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:50,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:50,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 14:58:50,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:50,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:50,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:50,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 14:58:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:50,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456330348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:50,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:50,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:50,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984177107] [2021-06-05 14:58:50,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:50,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:50,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:50,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:50,849 INFO L87 Difference]: Start difference. First operand 932 states and 2220 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:52,202 INFO L93 Difference]: Finished difference Result 2125 states and 5192 transitions. [2021-06-05 14:58:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:58:52,202 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:58:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:52,205 INFO L225 Difference]: With dead ends: 2125 [2021-06-05 14:58:52,205 INFO L226 Difference]: Without dead ends: 2107 [2021-06-05 14:58:52,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 960.4ms TimeCoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:58:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-06-05 14:58:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 923. [2021-06-05 14:58:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-06-05 14:58:52,216 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-06-05 14:58:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:52,216 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-06-05 14:58:52,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-06-05 14:58:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:52,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:52,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:52,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 14:58:52,418 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:52,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:52,418 INFO L82 PathProgramCache]: Analyzing trace with hash -823967964, now seen corresponding path program 71 times [2021-06-05 14:58:52,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:52,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211483272] [2021-06-05 14:58:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:52,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:52,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211483272] [2021-06-05 14:58:52,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211483272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:52,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474565368] [2021-06-05 14:58:52,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:52,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:58:52,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:52,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:52,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:52,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:52,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:52,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:52,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:58:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474565368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:52,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:52,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:58:52,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133494087] [2021-06-05 14:58:52,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:58:52,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:58:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:52,846 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:54,190 INFO L93 Difference]: Finished difference Result 2282 states and 5537 transitions. [2021-06-05 14:58:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:58:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:58:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:54,193 INFO L225 Difference]: With dead ends: 2282 [2021-06-05 14:58:54,193 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 14:58:54,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 984.4ms TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:58:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 14:58:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 902. [2021-06-05 14:58:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-06-05 14:58:54,205 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-06-05 14:58:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:54,205 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-06-05 14:58:54,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:58:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-06-05 14:58:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:54,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:54,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:54,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:54,408 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1416027862, now seen corresponding path program 72 times [2021-06-05 14:58:54,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:54,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008858515] [2021-06-05 14:58:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:54,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:54,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008858515] [2021-06-05 14:58:54,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008858515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:54,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399081728] [2021-06-05 14:58:54,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:54,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:58:54,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:54,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:54,822 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 14:58:54,822 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-06-05 14:58:54,824 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:54,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:54,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:54,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:9 [2021-06-05 14:58:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:54,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399081728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:54,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:54,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 14:58:54,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039238710] [2021-06-05 14:58:54,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:58:54,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:54,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:58:54,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:54,855 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:55,755 INFO L93 Difference]: Finished difference Result 2270 states and 5585 transitions. [2021-06-05 14:58:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:58:55,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:55,757 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 14:58:55,758 INFO L226 Difference]: Without dead ends: 2261 [2021-06-05 14:58:55,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:58:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-06-05 14:58:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 923. [2021-06-05 14:58:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.382863340563991) internal successors, (2197), 922 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2197 transitions. [2021-06-05 14:58:55,770 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2197 transitions. Word has length 29 [2021-06-05 14:58:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:55,770 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2197 transitions. [2021-06-05 14:58:55,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2197 transitions. [2021-06-05 14:58:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:55,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:55,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:55,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 14:58:55,971 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1142356124, now seen corresponding path program 73 times [2021-06-05 14:58:55,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:55,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139429262] [2021-06-05 14:58:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:56,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:56,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139429262] [2021-06-05 14:58:56,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139429262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:56,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867668001] [2021-06-05 14:58:56,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:56,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:56,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:56,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:56,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:56,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:56,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:56,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:58:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:56,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867668001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:56,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:56,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:58:56,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386442994] [2021-06-05 14:58:56,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:58:56,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:58:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:58:56,355 INFO L87 Difference]: Start difference. First operand 923 states and 2197 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:57,098 INFO L93 Difference]: Finished difference Result 2303 states and 5689 transitions. [2021-06-05 14:58:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:58:57,099 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:57,105 INFO L225 Difference]: With dead ends: 2303 [2021-06-05 14:58:57,106 INFO L226 Difference]: Without dead ends: 2292 [2021-06-05 14:58:57,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 575.1ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:58:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-06-05 14:58:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 935. [2021-06-05 14:58:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3843683083511777) internal successors, (2227), 934 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2227 transitions. [2021-06-05 14:58:57,118 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2227 transitions. Word has length 29 [2021-06-05 14:58:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:57,118 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2227 transitions. [2021-06-05 14:58:57,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2227 transitions. [2021-06-05 14:58:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:57,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:57,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:57,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:57,319 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash -477152956, now seen corresponding path program 74 times [2021-06-05 14:58:57,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:57,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899032772] [2021-06-05 14:58:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:57,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:57,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899032772] [2021-06-05 14:58:57,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899032772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:57,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494091071] [2021-06-05 14:58:57,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:57,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:57,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:58:57,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:58:57,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:57,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:57,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:57,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:58:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:57,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494091071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:57,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:57,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:58:57,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052382057] [2021-06-05 14:58:57,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:58:57,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:57,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:58:57,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:58:57,701 INFO L87 Difference]: Start difference. First operand 935 states and 2227 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:58,355 INFO L93 Difference]: Finished difference Result 2383 states and 5882 transitions. [2021-06-05 14:58:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:58:58,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:58:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:58,358 INFO L225 Difference]: With dead ends: 2383 [2021-06-05 14:58:58,358 INFO L226 Difference]: Without dead ends: 2363 [2021-06-05 14:58:58,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:58:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-06-05 14:58:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 914. [2021-06-05 14:58:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-06-05 14:58:58,370 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-06-05 14:58:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:58,370 INFO L482 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-06-05 14:58:58,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-06-05 14:58:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:58:58,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:58,371 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:58,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:58,572 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:58,572 INFO L82 PathProgramCache]: Analyzing trace with hash 216748502, now seen corresponding path program 75 times [2021-06-05 14:58:58,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:58,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518419231] [2021-06-05 14:58:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:58,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:58,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518419231] [2021-06-05 14:58:58,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518419231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:58,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722045781] [2021-06-05 14:58:58,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:58,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:58:58,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:58:58,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:58,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:58:58,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:58,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:58,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:58,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:58:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:59,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722045781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:59,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:59,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:58:59,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703301683] [2021-06-05 14:58:59,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:58:59,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:59,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:58:59,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:59,007 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:00,355 INFO L93 Difference]: Finished difference Result 2294 states and 5646 transitions. [2021-06-05 14:59:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:59:00,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:00,358 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 14:59:00,358 INFO L226 Difference]: Without dead ends: 2283 [2021-06-05 14:59:00,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 962.0ms TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:59:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-06-05 14:59:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 935. [2021-06-05 14:59:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3843683083511777) internal successors, (2227), 934 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2227 transitions. [2021-06-05 14:59:00,371 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2227 transitions. Word has length 29 [2021-06-05 14:59:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:00,371 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2227 transitions. [2021-06-05 14:59:00,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2227 transitions. [2021-06-05 14:59:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:00,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:00,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:00,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 14:59:00,579 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1973149552, now seen corresponding path program 76 times [2021-06-05 14:59:00,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:00,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426202076] [2021-06-05 14:59:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:00,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:00,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426202076] [2021-06-05 14:59:00,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426202076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:00,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853985249] [2021-06-05 14:59:00,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:00,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:00,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:00,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:00,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:00,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:00,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:00,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:59:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:00,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853985249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:00,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:00,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:59:00,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745545912] [2021-06-05 14:59:00,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:59:00,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:00,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:59:00,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:00,979 INFO L87 Difference]: Start difference. First operand 935 states and 2227 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:02,196 INFO L93 Difference]: Finished difference Result 2384 states and 5870 transitions. [2021-06-05 14:59:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:59:02,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:02,198 INFO L225 Difference]: With dead ends: 2384 [2021-06-05 14:59:02,199 INFO L226 Difference]: Without dead ends: 2364 [2021-06-05 14:59:02,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:59:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-06-05 14:59:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 923. [2021-06-05 14:59:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-06-05 14:59:02,211 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-06-05 14:59:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:02,211 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-06-05 14:59:02,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-06-05 14:59:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:02,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:02,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:02,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:02,417 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:02,417 INFO L82 PathProgramCache]: Analyzing trace with hash -792863676, now seen corresponding path program 77 times [2021-06-05 14:59:02,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:02,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414640192] [2021-06-05 14:59:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:02,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:02,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414640192] [2021-06-05 14:59:02,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414640192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:02,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588349388] [2021-06-05 14:59:02,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:02,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:59:02,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:02,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:02,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:02,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:02,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:02,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:02,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:59:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:02,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588349388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:02,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:02,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:59:02,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492882450] [2021-06-05 14:59:02,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:02,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:02,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:02,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:02,854 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:04,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:04,407 INFO L93 Difference]: Finished difference Result 2095 states and 5104 transitions. [2021-06-05 14:59:04,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:59:04,408 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:04,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:04,410 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 14:59:04,410 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 14:59:04,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1085.8ms TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:59:04,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 14:59:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 905. [2021-06-05 14:59:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-06-05 14:59:04,420 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-06-05 14:59:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:04,421 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-06-05 14:59:04,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-06-05 14:59:04,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:04,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:04,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:04,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:04,623 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1290856278, now seen corresponding path program 78 times [2021-06-05 14:59:04,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:04,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019045532] [2021-06-05 14:59:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:04,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:04,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019045532] [2021-06-05 14:59:04,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019045532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:04,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383422818] [2021-06-05 14:59:04,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:04,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:59:04,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:04,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:05,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:05,052 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 21 treesize of output 37 [2021-06-05 14:59:05,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:59:05,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:05,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:05,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:177 [2021-06-05 14:59:05,253 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-06-05 14:59:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:05,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383422818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:05,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:05,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 14:59:05,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104398985] [2021-06-05 14:59:05,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:59:05,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:05,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:59:05,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:05,415 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:07,232 INFO L93 Difference]: Finished difference Result 2317 states and 5705 transitions. [2021-06-05 14:59:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:59:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:07,235 INFO L225 Difference]: With dead ends: 2317 [2021-06-05 14:59:07,235 INFO L226 Difference]: Without dead ends: 2306 [2021-06-05 14:59:07,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1546.7ms TimeCoverageRelationStatistics Valid=414, Invalid=2136, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:59:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-06-05 14:59:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 945. [2021-06-05 14:59:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.3866525423728815) internal successors, (2253), 944 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2253 transitions. [2021-06-05 14:59:07,248 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2253 transitions. Word has length 29 [2021-06-05 14:59:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:07,248 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 2253 transitions. [2021-06-05 14:59:07,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2253 transitions. [2021-06-05 14:59:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:07,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:07,249 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:07,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:07,453 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:07,453 INFO L82 PathProgramCache]: Analyzing trace with hash 465544772, now seen corresponding path program 79 times [2021-06-05 14:59:07,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:07,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947272391] [2021-06-05 14:59:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:07,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947272391] [2021-06-05 14:59:07,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947272391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970208387] [2021-06-05 14:59:07,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:07,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:07,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:07,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:07,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:07,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:07,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:59:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:07,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970208387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:07,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:07,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:59:07,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069892485] [2021-06-05 14:59:07,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:59:07,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:07,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:59:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:07,821 INFO L87 Difference]: Start difference. First operand 945 states and 2253 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:08,771 INFO L93 Difference]: Finished difference Result 2554 states and 6271 transitions. [2021-06-05 14:59:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:59:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:08,775 INFO L225 Difference]: With dead ends: 2554 [2021-06-05 14:59:08,775 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 14:59:08,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 806.6ms TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:59:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 14:59:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 935. [2021-06-05 14:59:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.380085653104925) internal successors, (2223), 934 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2223 transitions. [2021-06-05 14:59:08,788 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2223 transitions. Word has length 29 [2021-06-05 14:59:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:08,788 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2223 transitions. [2021-06-05 14:59:08,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2223 transitions. [2021-06-05 14:59:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:08,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:08,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:08,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:08,990 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:08,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1105795140, now seen corresponding path program 80 times [2021-06-05 14:59:08,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:08,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561569180] [2021-06-05 14:59:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:09,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:09,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561569180] [2021-06-05 14:59:09,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561569180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:09,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969194658] [2021-06-05 14:59:09,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:09,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:09,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:59:09,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:59:09,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:09,444 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 23 treesize of output 31 [2021-06-05 14:59:09,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:59:09,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:09,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:09,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:69 [2021-06-05 14:59:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:09,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969194658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:09,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:09,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 14:59:09,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400022823] [2021-06-05 14:59:09,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:59:09,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:09,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:59:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:09,598 INFO L87 Difference]: Start difference. First operand 935 states and 2223 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:11,360 INFO L93 Difference]: Finished difference Result 2321 states and 5636 transitions. [2021-06-05 14:59:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:59:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:11,363 INFO L225 Difference]: With dead ends: 2321 [2021-06-05 14:59:11,363 INFO L226 Difference]: Without dead ends: 2301 [2021-06-05 14:59:11,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1178.4ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:59:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-05 14:59:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 920. [2021-06-05 14:59:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.3754080522306857) internal successors, (2183), 919 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2183 transitions. [2021-06-05 14:59:11,375 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2183 transitions. Word has length 29 [2021-06-05 14:59:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:11,375 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2183 transitions. [2021-06-05 14:59:11,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2183 transitions. [2021-06-05 14:59:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:11,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:11,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:11,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 14:59:11,577 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1875927132, now seen corresponding path program 81 times [2021-06-05 14:59:11,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:11,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914196452] [2021-06-05 14:59:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:11,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:11,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914196452] [2021-06-05 14:59:11,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914196452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:11,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782498368] [2021-06-05 14:59:11,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:11,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:59:11,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:11,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:11,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:11,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:11,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:11,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:11,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:59:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:11,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782498368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:11,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:11,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:59:11,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091392205] [2021-06-05 14:59:11,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:11,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:12,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:12,000 INFO L87 Difference]: Start difference. First operand 920 states and 2183 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:13,061 INFO L93 Difference]: Finished difference Result 2100 states and 5101 transitions. [2021-06-05 14:59:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:59:13,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:13,063 INFO L225 Difference]: With dead ends: 2100 [2021-06-05 14:59:13,064 INFO L226 Difference]: Without dead ends: 2090 [2021-06-05 14:59:13,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 731.0ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:59:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-06-05 14:59:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 914. [2021-06-05 14:59:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.375684556407448) internal successors, (2169), 913 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2169 transitions. [2021-06-05 14:59:13,074 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2169 transitions. Word has length 29 [2021-06-05 14:59:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:13,074 INFO L482 AbstractCegarLoop]: Abstraction has 914 states and 2169 transitions. [2021-06-05 14:59:13,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2169 transitions. [2021-06-05 14:59:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:13,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:13,075 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:13,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:13,276 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash 48077248, now seen corresponding path program 82 times [2021-06-05 14:59:13,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:13,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135776422] [2021-06-05 14:59:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:13,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:13,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135776422] [2021-06-05 14:59:13,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135776422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:13,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101721814] [2021-06-05 14:59:13,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:13,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:13,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:13,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:13,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:13,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:13,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:13,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:13,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:59:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:13,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101721814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:13,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:13,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:59:13,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864478357] [2021-06-05 14:59:13,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:13,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:13,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:13,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:13,719 INFO L87 Difference]: Start difference. First operand 914 states and 2169 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:59:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:14,957 INFO L93 Difference]: Finished difference Result 2106 states and 5144 transitions. [2021-06-05 14:59:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:59:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:59:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:14,959 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 14:59:14,959 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 14:59:14,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 951.0ms TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:59:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 14:59:14,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 931. [2021-06-05 14:59:14,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.3806451612903228) internal successors, (2214), 930 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2214 transitions. [2021-06-05 14:59:14,970 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2214 transitions. Word has length 29 [2021-06-05 14:59:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:14,970 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2214 transitions. [2021-06-05 14:59:14,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:59:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2214 transitions. [2021-06-05 14:59:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:14,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:14,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:15,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 14:59:15,172 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash 321748986, now seen corresponding path program 83 times [2021-06-05 14:59:15,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:15,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483149095] [2021-06-05 14:59:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:15,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:15,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483149095] [2021-06-05 14:59:15,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483149095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:15,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461475147] [2021-06-05 14:59:15,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:15,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:59:15,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:15,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:15,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:15,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:15,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:15,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:15,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:15,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:59:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:15,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461475147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:15,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:15,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:59:15,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748842599] [2021-06-05 14:59:15,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:15,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:15,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:15,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:15,580 INFO L87 Difference]: Start difference. First operand 931 states and 2214 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:17,087 INFO L93 Difference]: Finished difference Result 2627 states and 6455 transitions. [2021-06-05 14:59:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:59:17,088 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:17,090 INFO L225 Difference]: With dead ends: 2627 [2021-06-05 14:59:17,091 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 14:59:17,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1188.8ms TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:59:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 14:59:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 940. [2021-06-05 14:59:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.382321618743344) internal successors, (2237), 939 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2237 transitions. [2021-06-05 14:59:17,105 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2237 transitions. Word has length 29 [2021-06-05 14:59:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:17,105 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 2237 transitions. [2021-06-05 14:59:17,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2237 transitions. [2021-06-05 14:59:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:17,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:17,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:17,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 14:59:17,307 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:17,307 INFO L82 PathProgramCache]: Analyzing trace with hash 986952154, now seen corresponding path program 84 times [2021-06-05 14:59:17,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:17,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472710998] [2021-06-05 14:59:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:17,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:17,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472710998] [2021-06-05 14:59:17,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472710998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:17,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103851948] [2021-06-05 14:59:17,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:17,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:59:17,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:17,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:17,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:17,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:17,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:17,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:17,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:17,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:59:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:17,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103851948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:17,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:17,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:59:17,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313613537] [2021-06-05 14:59:17,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:59:17,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:17,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:59:17,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:17,706 INFO L87 Difference]: Start difference. First operand 940 states and 2237 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:18,729 INFO L93 Difference]: Finished difference Result 2245 states and 5511 transitions. [2021-06-05 14:59:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:59:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:18,732 INFO L225 Difference]: With dead ends: 2245 [2021-06-05 14:59:18,732 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 14:59:18,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 802.3ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:59:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 14:59:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 922. [2021-06-05 14:59:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.3789359391965257) internal successors, (2191), 921 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2191 transitions. [2021-06-05 14:59:18,743 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2191 transitions. Word has length 29 [2021-06-05 14:59:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:18,743 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2191 transitions. [2021-06-05 14:59:18,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2191 transitions. [2021-06-05 14:59:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:18,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:18,744 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:18,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 14:59:18,945 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1887372330, now seen corresponding path program 85 times [2021-06-05 14:59:18,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:18,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110570462] [2021-06-05 14:59:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:19,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110570462] [2021-06-05 14:59:19,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110570462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070250770] [2021-06-05 14:59:19,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:19,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:19,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:19,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:19,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:19,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:19,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 14:59:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:19,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070250770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:19,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:19,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:59:19,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518511429] [2021-06-05 14:59:19,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:59:19,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:19,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:59:19,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:59:19,358 INFO L87 Difference]: Start difference. First operand 922 states and 2191 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:20,569 INFO L93 Difference]: Finished difference Result 2745 states and 6830 transitions. [2021-06-05 14:59:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:59:20,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:20,576 INFO L225 Difference]: With dead ends: 2745 [2021-06-05 14:59:20,576 INFO L226 Difference]: Without dead ends: 2732 [2021-06-05 14:59:20,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1022.8ms TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:59:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-06-05 14:59:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 935. [2021-06-05 14:59:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3832976445396143) internal successors, (2226), 934 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2226 transitions. [2021-06-05 14:59:20,590 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2226 transitions. Word has length 29 [2021-06-05 14:59:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:20,590 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2226 transitions. [2021-06-05 14:59:20,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2226 transitions. [2021-06-05 14:59:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:20,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:20,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:20,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 14:59:20,791 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:20,791 INFO L82 PathProgramCache]: Analyzing trace with hash -651193916, now seen corresponding path program 86 times [2021-06-05 14:59:20,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:20,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594990005] [2021-06-05 14:59:20,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:20,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:20,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594990005] [2021-06-05 14:59:20,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594990005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:20,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160386769] [2021-06-05 14:59:20,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:21,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:21,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:21,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:21,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:59:21,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:59:21,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:21,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:21,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:21,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:59:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:21,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160386769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:21,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:21,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:59:21,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419180194] [2021-06-05 14:59:21,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:59:21,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:21,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:59:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:59:21,202 INFO L87 Difference]: Start difference. First operand 935 states and 2226 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:22,415 INFO L93 Difference]: Finished difference Result 2456 states and 6089 transitions. [2021-06-05 14:59:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:59:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:22,418 INFO L225 Difference]: With dead ends: 2456 [2021-06-05 14:59:22,418 INFO L226 Difference]: Without dead ends: 2439 [2021-06-05 14:59:22,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1014.6ms TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:59:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2021-06-05 14:59:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 923. [2021-06-05 14:59:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.382863340563991) internal successors, (2197), 922 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2197 transitions. [2021-06-05 14:59:22,435 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2197 transitions. Word has length 29 [2021-06-05 14:59:22,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:22,435 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2197 transitions. [2021-06-05 14:59:22,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2197 transitions. [2021-06-05 14:59:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:22,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:22,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:22,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 14:59:22,636 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:22,637 INFO L82 PathProgramCache]: Analyzing trace with hash 877760152, now seen corresponding path program 87 times [2021-06-05 14:59:22,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:22,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118082917] [2021-06-05 14:59:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:22,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:22,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118082917] [2021-06-05 14:59:22,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118082917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:22,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58274788] [2021-06-05 14:59:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:22,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:22,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:22,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:23,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:23,157 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 19 treesize of output 35 [2021-06-05 14:59:23,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:59:23,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:23,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:23,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:113 [2021-06-05 14:59:23,487 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-05 14:59:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:23,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58274788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:23,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:23,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 14:59:23,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817473730] [2021-06-05 14:59:23,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:59:23,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:59:23,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:23,522 INFO L87 Difference]: Start difference. First operand 923 states and 2197 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:26,534 INFO L93 Difference]: Finished difference Result 2289 states and 5600 transitions. [2021-06-05 14:59:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 14:59:26,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:26,537 INFO L225 Difference]: With dead ends: 2289 [2021-06-05 14:59:26,537 INFO L226 Difference]: Without dead ends: 2276 [2021-06-05 14:59:26,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2258.2ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 14:59:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-05 14:59:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 917. [2021-06-05 14:59:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.3799126637554586) internal successors, (2180), 916 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2180 transitions. [2021-06-05 14:59:26,548 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2180 transitions. Word has length 29 [2021-06-05 14:59:26,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:26,548 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2180 transitions. [2021-06-05 14:59:26,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2180 transitions. [2021-06-05 14:59:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:26,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:26,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:26,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:26,750 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:26,750 INFO L82 PathProgramCache]: Analyzing trace with hash 106621528, now seen corresponding path program 88 times [2021-06-05 14:59:26,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:26,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100186160] [2021-06-05 14:59:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:26,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:26,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100186160] [2021-06-05 14:59:26,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100186160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:26,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976150700] [2021-06-05 14:59:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:26,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:26,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:26,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:27,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:27,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:27,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:27,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:27,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:59:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:27,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976150700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:27,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:27,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 14:59:27,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12274096] [2021-06-05 14:59:27,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:59:27,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:27,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:59:27,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:27,166 INFO L87 Difference]: Start difference. First operand 917 states and 2180 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:28,467 INFO L93 Difference]: Finished difference Result 2287 states and 5597 transitions. [2021-06-05 14:59:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:59:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:28,470 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 14:59:28,470 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 14:59:28,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 869.7ms TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:59:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 14:59:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 905. [2021-06-05 14:59:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-06-05 14:59:28,483 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-06-05 14:59:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:28,483 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-06-05 14:59:28,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-06-05 14:59:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:28,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:28,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:28,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:28,684 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:28,684 INFO L82 PathProgramCache]: Analyzing trace with hash -296310166, now seen corresponding path program 89 times [2021-06-05 14:59:28,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:28,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181283937] [2021-06-05 14:59:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:28,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181283937] [2021-06-05 14:59:28,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181283937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:28,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968837348] [2021-06-05 14:59:28,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:28,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:59:28,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:28,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:29,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:29,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:29,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:29,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:29,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:59:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:29,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968837348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:29,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:29,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:59:29,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115020036] [2021-06-05 14:59:29,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:29,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:29,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:29,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:29,100 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:59:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:30,307 INFO L93 Difference]: Finished difference Result 2286 states and 5555 transitions. [2021-06-05 14:59:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:59:30,307 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:59:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:30,309 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 14:59:30,309 INFO L226 Difference]: Without dead ends: 2269 [2021-06-05 14:59:30,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 885.1ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:59:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-06-05 14:59:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 923. [2021-06-05 14:59:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-06-05 14:59:30,320 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-06-05 14:59:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:30,320 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-06-05 14:59:30,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:59:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-06-05 14:59:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:30,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:30,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:30,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:30,533 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash -22638428, now seen corresponding path program 90 times [2021-06-05 14:59:30,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:30,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597095914] [2021-06-05 14:59:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:30,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:30,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597095914] [2021-06-05 14:59:30,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597095914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:30,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555748938] [2021-06-05 14:59:30,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:30,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:59:30,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:30,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:30,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:59:30,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:59:30,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:30,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:30,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:30,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:59:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:30,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555748938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:30,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:30,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:59:30,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250002938] [2021-06-05 14:59:30,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:30,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:30,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:30,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:30,929 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:32,509 INFO L93 Difference]: Finished difference Result 2745 states and 6751 transitions. [2021-06-05 14:59:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:59:32,509 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:32,512 INFO L225 Difference]: With dead ends: 2745 [2021-06-05 14:59:32,512 INFO L226 Difference]: Without dead ends: 2732 [2021-06-05 14:59:32,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1277.1ms TimeCoverageRelationStatistics Valid=470, Invalid=1882, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:59:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-06-05 14:59:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 939. [2021-06-05 14:59:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.384861407249467) internal successors, (2237), 938 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2237 transitions. [2021-06-05 14:59:32,524 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2237 transitions. Word has length 29 [2021-06-05 14:59:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:32,524 INFO L482 AbstractCegarLoop]: Abstraction has 939 states and 2237 transitions. [2021-06-05 14:59:32,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2237 transitions. [2021-06-05 14:59:32,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:32,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:32,525 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:32,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:32,726 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash 642564740, now seen corresponding path program 91 times [2021-06-05 14:59:32,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:32,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313085080] [2021-06-05 14:59:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:32,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:32,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313085080] [2021-06-05 14:59:32,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313085080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:32,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585647621] [2021-06-05 14:59:32,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:32,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:33,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 14:59:33,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:59:33,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:33,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:33,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:33,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:59:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:33,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585647621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:33,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:33,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:59:33,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220900328] [2021-06-05 14:59:33,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:59:33,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:33,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:59:33,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:33,106 INFO L87 Difference]: Start difference. First operand 939 states and 2237 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:34,092 INFO L93 Difference]: Finished difference Result 2366 states and 5818 transitions. [2021-06-05 14:59:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:59:34,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:59:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:34,095 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 14:59:34,095 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 14:59:34,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 796.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:59:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 14:59:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 908. [2021-06-05 14:59:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 2.377067254685777) internal successors, (2156), 907 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2156 transitions. [2021-06-05 14:59:34,107 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2156 transitions. Word has length 29 [2021-06-05 14:59:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:34,107 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 2156 transitions. [2021-06-05 14:59:34,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2156 transitions. [2021-06-05 14:59:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:59:34,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:34,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:34,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:34,308 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash -608198470, now seen corresponding path program 92 times [2021-06-05 14:59:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:34,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187112189] [2021-06-05 14:59:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:34,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:34,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187112189] [2021-06-05 14:59:34,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187112189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:34,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97483785] [2021-06-05 14:59:34,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:34,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:34,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:59:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:34,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 14:59:34,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:34,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:34,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:34,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 14:59:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:34,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97483785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:34,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:34,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:59:34,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530828746] [2021-06-05 14:59:34,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:34,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:34,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:34,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:34,692 INFO L87 Difference]: Start difference. First operand 908 states and 2156 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:59:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:35,403 INFO L93 Difference]: Finished difference Result 2096 states and 5106 transitions. [2021-06-05 14:59:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:59:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-06-05 14:59:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:35,406 INFO L225 Difference]: With dead ends: 2096 [2021-06-05 14:59:35,406 INFO L226 Difference]: Without dead ends: 2087 [2021-06-05 14:59:35,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:59:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-06-05 14:59:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 901. [2021-06-05 14:59:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.3777777777777778) internal successors, (2140), 900 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 2140 transitions. [2021-06-05 14:59:35,417 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 2140 transitions. Word has length 29 [2021-06-05 14:59:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:35,417 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 2140 transitions. [2021-06-05 14:59:35,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-06-05 14:59:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 2140 transitions. [2021-06-05 14:59:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:35,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:35,418 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:35,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:35,619 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash -154214669, now seen corresponding path program 1 times [2021-06-05 14:59:35,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:35,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808515805] [2021-06-05 14:59:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:35,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:35,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808515805] [2021-06-05 14:59:35,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808515805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:35,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556882543] [2021-06-05 14:59:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:35,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:35,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:36,069 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 14:59:36,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 14:59:36,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:36,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:36,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:36,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 14:59:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:36,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556882543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:36,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:36,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 14:59:36,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90844955] [2021-06-05 14:59:36,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:36,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:36,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:36,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:36,096 INFO L87 Difference]: Start difference. First operand 901 states and 2140 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:37,230 INFO L93 Difference]: Finished difference Result 2216 states and 5379 transitions. [2021-06-05 14:59:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:59:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:37,233 INFO L225 Difference]: With dead ends: 2216 [2021-06-05 14:59:37,233 INFO L226 Difference]: Without dead ends: 2206 [2021-06-05 14:59:37,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 661.3ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:59:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2021-06-05 14:59:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 904. [2021-06-05 14:59:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.3754152823920265) internal successors, (2145), 903 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2145 transitions. [2021-06-05 14:59:37,243 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2145 transitions. Word has length 30 [2021-06-05 14:59:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:37,243 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2145 transitions. [2021-06-05 14:59:37,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2145 transitions. [2021-06-05 14:59:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:37,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:37,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:37,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 14:59:37,445 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash 351841351, now seen corresponding path program 2 times [2021-06-05 14:59:37,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:37,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730873239] [2021-06-05 14:59:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:37,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:37,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730873239] [2021-06-05 14:59:37,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730873239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:37,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787705638] [2021-06-05 14:59:37,649 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:37,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:37,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:37,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:37,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:37,827 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 14:59:37,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 14:59:37,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:37,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:37,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:37,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 14:59:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:37,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787705638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:37,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:37,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 14:59:37,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624829768] [2021-06-05 14:59:37,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:59:37,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:37,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:59:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:37,856 INFO L87 Difference]: Start difference. First operand 904 states and 2145 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:39,119 INFO L93 Difference]: Finished difference Result 2488 states and 6084 transitions. [2021-06-05 14:59:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:59:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:39,122 INFO L225 Difference]: With dead ends: 2488 [2021-06-05 14:59:39,122 INFO L226 Difference]: Without dead ends: 2477 [2021-06-05 14:59:39,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 811.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:59:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-06-05 14:59:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 943. [2021-06-05 14:59:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.3842887473460723) internal successors, (2246), 942 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2246 transitions. [2021-06-05 14:59:39,135 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2246 transitions. Word has length 30 [2021-06-05 14:59:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:39,136 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 2246 transitions. [2021-06-05 14:59:39,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2246 transitions. [2021-06-05 14:59:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:39,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:39,137 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:39,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 14:59:39,337 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:39,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2108242401, now seen corresponding path program 3 times [2021-06-05 14:59:39,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:39,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114682174] [2021-06-05 14:59:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:39,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:39,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114682174] [2021-06-05 14:59:39,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114682174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:39,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022607887] [2021-06-05 14:59:39,543 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:39,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:59:39,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:39,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:59:39,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:39,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:39,803 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 20 treesize of output 36 [2021-06-05 14:59:39,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:39,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:39,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:39,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-06-05 14:59:40,063 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-06-05 14:59:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:40,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022607887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:40,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:40,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 14:59:40,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170293076] [2021-06-05 14:59:40,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:59:40,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:40,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:59:40,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:59:40,099 INFO L87 Difference]: Start difference. First operand 943 states and 2246 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,680 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-05 14:59:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:42,117 INFO L93 Difference]: Finished difference Result 2409 states and 5926 transitions. [2021-06-05 14:59:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:59:42,118 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:42,120 INFO L225 Difference]: With dead ends: 2409 [2021-06-05 14:59:42,120 INFO L226 Difference]: Without dead ends: 2396 [2021-06-05 14:59:42,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1758.5ms TimeCoverageRelationStatistics Valid=486, Invalid=2270, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:59:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-05 14:59:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 939. [2021-06-05 14:59:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.38272921108742) internal successors, (2235), 938 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2235 transitions. [2021-06-05 14:59:42,131 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2235 transitions. Word has length 30 [2021-06-05 14:59:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:42,131 INFO L482 AbstractCegarLoop]: Abstraction has 939 states and 2235 transitions. [2021-06-05 14:59:42,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2235 transitions. [2021-06-05 14:59:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:42,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:42,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:42,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 14:59:42,332 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1190292211, now seen corresponding path program 4 times [2021-06-05 14:59:42,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:42,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170630892] [2021-06-05 14:59:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:42,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:42,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170630892] [2021-06-05 14:59:42,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170630892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714795246] [2021-06-05 14:59:42,559 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:42,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:42,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:42,729 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 14:59:42,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 14:59:42,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:42,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:42,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:42,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 14:59:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:42,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714795246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:42,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 14:59:42,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822321847] [2021-06-05 14:59:42,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:42,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:42,773 INFO L87 Difference]: Start difference. First operand 939 states and 2235 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:44,201 INFO L93 Difference]: Finished difference Result 2854 states and 6989 transitions. [2021-06-05 14:59:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:59:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:44,211 INFO L225 Difference]: With dead ends: 2854 [2021-06-05 14:59:44,211 INFO L226 Difference]: Without dead ends: 2836 [2021-06-05 14:59:44,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1114.9ms TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:59:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2021-06-05 14:59:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 927. [2021-06-05 14:59:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.379049676025918) internal successors, (2203), 926 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2203 transitions. [2021-06-05 14:59:44,224 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2203 transitions. Word has length 30 [2021-06-05 14:59:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:44,224 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 2203 transitions. [2021-06-05 14:59:44,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2203 transitions. [2021-06-05 14:59:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:44,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:44,225 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:44,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:44,433 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1651280687, now seen corresponding path program 5 times [2021-06-05 14:59:44,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:44,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660309883] [2021-06-05 14:59:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:44,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660309883] [2021-06-05 14:59:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660309883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:44,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039204907] [2021-06-05 14:59:44,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:44,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:59:44,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:44,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:44,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:44,828 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 14:59:44,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 14:59:44,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:44,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:44,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:44,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 14:59:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:44,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039204907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:44,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:44,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 14:59:44,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221055530] [2021-06-05 14:59:44,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:44,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:44,858 INFO L87 Difference]: Start difference. First operand 927 states and 2203 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:45,855 INFO L93 Difference]: Finished difference Result 2280 states and 5518 transitions. [2021-06-05 14:59:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:59:45,855 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:45,857 INFO L225 Difference]: With dead ends: 2280 [2021-06-05 14:59:45,857 INFO L226 Difference]: Without dead ends: 2260 [2021-06-05 14:59:45,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:59:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-06-05 14:59:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 925. [2021-06-05 14:59:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.378787878787879) internal successors, (2198), 924 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2198 transitions. [2021-06-05 14:59:45,868 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2198 transitions. Word has length 30 [2021-06-05 14:59:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:45,869 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2198 transitions. [2021-06-05 14:59:45,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2198 transitions. [2021-06-05 14:59:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:45,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:45,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:46,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 14:59:46,070 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:46,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1006114153, now seen corresponding path program 6 times [2021-06-05 14:59:46,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:46,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341562195] [2021-06-05 14:59:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:46,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:46,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341562195] [2021-06-05 14:59:46,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341562195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:46,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074216190] [2021-06-05 14:59:46,282 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:46,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:59:46,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:46,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:46,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:46,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 14:59:46,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:46,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:46,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:46,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 14:59:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:46,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074216190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:46,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:46,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 14:59:46,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889740111] [2021-06-05 14:59:46,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:46,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:46,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:46,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:46,473 INFO L87 Difference]: Start difference. First operand 925 states and 2198 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:47,630 INFO L93 Difference]: Finished difference Result 2372 states and 5731 transitions. [2021-06-05 14:59:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:59:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:47,632 INFO L225 Difference]: With dead ends: 2372 [2021-06-05 14:59:47,633 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 14:59:47,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:59:47,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 14:59:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 919. [2021-06-05 14:59:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.377995642701525) internal successors, (2183), 918 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2183 transitions. [2021-06-05 14:59:47,646 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2183 transitions. Word has length 30 [2021-06-05 14:59:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:47,646 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2183 transitions. [2021-06-05 14:59:47,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2183 transitions. [2021-06-05 14:59:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:47,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:47,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:47,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 14:59:47,865 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:47,865 INFO L82 PathProgramCache]: Analyzing trace with hash -627290201, now seen corresponding path program 7 times [2021-06-05 14:59:47,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:47,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850761690] [2021-06-05 14:59:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:48,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:48,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850761690] [2021-06-05 14:59:48,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850761690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:48,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362032460] [2021-06-05 14:59:48,081 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:48,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:48,273 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 14:59:48,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 14:59:48,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:48,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:48,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:48,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 14:59:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:48,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362032460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:48,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:48,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 14:59:48,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598298410] [2021-06-05 14:59:48,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:48,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:48,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:48,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:48,299 INFO L87 Difference]: Start difference. First operand 919 states and 2183 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:49,368 INFO L93 Difference]: Finished difference Result 2181 states and 5300 transitions. [2021-06-05 14:59:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:59:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:49,371 INFO L225 Difference]: With dead ends: 2181 [2021-06-05 14:59:49,371 INFO L226 Difference]: Without dead ends: 2171 [2021-06-05 14:59:49,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:59:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-05 14:59:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 919. [2021-06-05 14:59:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.377995642701525) internal successors, (2183), 918 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2183 transitions. [2021-06-05 14:59:49,381 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2183 transitions. Word has length 30 [2021-06-05 14:59:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:49,382 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2183 transitions. [2021-06-05 14:59:49,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2183 transitions. [2021-06-05 14:59:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:49,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:49,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:49,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 14:59:49,584 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:49,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1787800249, now seen corresponding path program 8 times [2021-06-05 14:59:49,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:49,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446060935] [2021-06-05 14:59:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:49,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:49,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446060935] [2021-06-05 14:59:49,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446060935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:49,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012205564] [2021-06-05 14:59:49,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:49,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:49,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:49,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:49,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:50,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 14:59:50,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:50,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:50,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:50,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 14:59:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:50,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012205564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:50,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:50,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 14:59:50,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091928417] [2021-06-05 14:59:50,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:59:50,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:50,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:59:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:50,040 INFO L87 Difference]: Start difference. First operand 919 states and 2183 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:51,390 INFO L93 Difference]: Finished difference Result 2227 states and 5452 transitions. [2021-06-05 14:59:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:59:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:51,392 INFO L225 Difference]: With dead ends: 2227 [2021-06-05 14:59:51,392 INFO L226 Difference]: Without dead ends: 2218 [2021-06-05 14:59:51,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 999.5ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:59:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-05 14:59:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 943. [2021-06-05 14:59:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.3832271762208066) internal successors, (2245), 942 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2245 transitions. [2021-06-05 14:59:51,404 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2245 transitions. Word has length 30 [2021-06-05 14:59:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:51,404 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 2245 transitions. [2021-06-05 14:59:51,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2245 transitions. [2021-06-05 14:59:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:51,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:51,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:51,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:51,606 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:51,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1886679911, now seen corresponding path program 9 times [2021-06-05 14:59:51,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:51,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916197110] [2021-06-05 14:59:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:51,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:51,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916197110] [2021-06-05 14:59:51,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916197110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:51,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560418354] [2021-06-05 14:59:51,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:51,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:51,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:51,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:52,005 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 14:59:52,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 14:59:52,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:52,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:52,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:52,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 14:59:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:52,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560418354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:52,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:52,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 14:59:52,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273001368] [2021-06-05 14:59:52,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:59:52,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:52,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:59:52,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:59:52,032 INFO L87 Difference]: Start difference. First operand 943 states and 2245 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:53,197 INFO L93 Difference]: Finished difference Result 2256 states and 5532 transitions. [2021-06-05 14:59:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:59:53,197 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:53,199 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 14:59:53,199 INFO L226 Difference]: Without dead ends: 2245 [2021-06-05 14:59:53,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 960.8ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:59:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-06-05 14:59:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 955. [2021-06-05 14:59:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 2.3846960167714886) internal successors, (2275), 954 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2275 transitions. [2021-06-05 14:59:53,211 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2275 transitions. Word has length 30 [2021-06-05 14:59:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:53,211 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 2275 transitions. [2021-06-05 14:59:53,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2275 transitions. [2021-06-05 14:59:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:53,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:53,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:53,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 14:59:53,413 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1743084217, now seen corresponding path program 10 times [2021-06-05 14:59:53,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:53,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685631395] [2021-06-05 14:59:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:53,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:53,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685631395] [2021-06-05 14:59:53,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685631395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:53,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94945982] [2021-06-05 14:59:53,646 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:53,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:53,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:53,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:53,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:53,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 14:59:53,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:53,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:53,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:53,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-06-05 14:59:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:53,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94945982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:53,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:53,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 14:59:53,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435390669] [2021-06-05 14:59:53,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:59:53,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:59:53,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:59:53,825 INFO L87 Difference]: Start difference. First operand 955 states and 2275 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:55,083 INFO L93 Difference]: Finished difference Result 2341 states and 5751 transitions. [2021-06-05 14:59:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:59:55,083 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:55,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:55,086 INFO L225 Difference]: With dead ends: 2341 [2021-06-05 14:59:55,086 INFO L226 Difference]: Without dead ends: 2321 [2021-06-05 14:59:55,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1035.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:59:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-06-05 14:59:55,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 934. [2021-06-05 14:59:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 2.380493033226152) internal successors, (2221), 933 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2221 transitions. [2021-06-05 14:59:55,097 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2221 transitions. Word has length 30 [2021-06-05 14:59:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:55,098 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 2221 transitions. [2021-06-05 14:59:55,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2221 transitions. [2021-06-05 14:59:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:55,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:55,099 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:55,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 14:59:55,299 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:55,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1320754679, now seen corresponding path program 11 times [2021-06-05 14:59:55,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:55,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351173760] [2021-06-05 14:59:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:55,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:55,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351173760] [2021-06-05 14:59:55,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351173760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:55,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417786395] [2021-06-05 14:59:55,547 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:55,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:59:55,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:55,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:59:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:55,710 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 14:59:55,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 14:59:55,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:55,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:55,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:55,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 14:59:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:55,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417786395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:55,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:55,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 14:59:55,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333460981] [2021-06-05 14:59:55,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:59:55,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:55,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:59:55,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:55,739 INFO L87 Difference]: Start difference. First operand 934 states and 2221 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:57,164 INFO L93 Difference]: Finished difference Result 2334 states and 5711 transitions. [2021-06-05 14:59:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:59:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:57,167 INFO L225 Difference]: With dead ends: 2334 [2021-06-05 14:59:57,167 INFO L226 Difference]: Without dead ends: 2323 [2021-06-05 14:59:57,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1064.8ms TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:59:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-06-05 14:59:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 949. [2021-06-05 14:59:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.3818565400843883) internal successors, (2258), 948 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2258 transitions. [2021-06-05 14:59:57,178 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2258 transitions. Word has length 30 [2021-06-05 14:59:57,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:57,178 INFO L482 AbstractCegarLoop]: Abstraction has 949 states and 2258 transitions. [2021-06-05 14:59:57,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2258 transitions. [2021-06-05 14:59:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:57,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:57,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:57,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:57,380 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash 435646371, now seen corresponding path program 12 times [2021-06-05 14:59:57,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:57,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186225270] [2021-06-05 14:59:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:57,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:57,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186225270] [2021-06-05 14:59:57,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186225270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:57,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703362101] [2021-06-05 14:59:57,628 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:57,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:59:57,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:57,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:59:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:57,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:57,822 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 [2021-06-05 14:59:57,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:57,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:57,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:57,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-06-05 14:59:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:57,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703362101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:57,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:57,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 14:59:57,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706836454] [2021-06-05 14:59:57,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:59:57,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:57,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:59:57,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:57,913 INFO L87 Difference]: Start difference. First operand 949 states and 2258 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:59,852 INFO L93 Difference]: Finished difference Result 2492 states and 6124 transitions. [2021-06-05 14:59:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 14:59:59,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 14:59:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:59,854 INFO L225 Difference]: With dead ends: 2492 [2021-06-05 14:59:59,854 INFO L226 Difference]: Without dead ends: 2480 [2021-06-05 14:59:59,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1582.7ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 14:59:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-06-05 14:59:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 970. [2021-06-05 14:59:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 2.3859649122807016) internal successors, (2312), 969 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2312 transitions. [2021-06-05 14:59:59,866 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2312 transitions. Word has length 30 [2021-06-05 14:59:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:59,866 INFO L482 AbstractCegarLoop]: Abstraction has 970 states and 2312 transitions. [2021-06-05 14:59:59,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2312 transitions. [2021-06-05 14:59:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:59:59,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:59,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:00,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:00,068 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:00,068 INFO L82 PathProgramCache]: Analyzing trace with hash -482303819, now seen corresponding path program 13 times [2021-06-05 15:00:00,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:00,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90430833] [2021-06-05 15:00:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:00,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:00,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90430833] [2021-06-05 15:00:00,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90430833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:00,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217588363] [2021-06-05 15:00:00,318 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:00,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:00,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:00,483 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 15:00:00,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 15:00:00,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:00,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:00,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:00,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 15:00:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:00,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217588363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:00,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:00,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:00,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160486413] [2021-06-05 15:00:00,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:00,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:00,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:00,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:00,531 INFO L87 Difference]: Start difference. First operand 970 states and 2312 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:02,863 INFO L93 Difference]: Finished difference Result 2813 states and 6856 transitions. [2021-06-05 15:00:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:00:02,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:02,866 INFO L225 Difference]: With dead ends: 2813 [2021-06-05 15:00:02,866 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 15:00:02,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1866.4ms TimeCoverageRelationStatistics Valid=680, Invalid=3226, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:00:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 15:00:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 937. [2021-06-05 15:00:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.3792735042735043) internal successors, (2227), 936 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2227 transitions. [2021-06-05 15:00:02,879 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2227 transitions. Word has length 30 [2021-06-05 15:00:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:02,879 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 2227 transitions. [2021-06-05 15:00:02,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2227 transitions. [2021-06-05 15:00:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:02,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:02,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:03,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 15:00:03,081 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash 971090579, now seen corresponding path program 14 times [2021-06-05 15:00:03,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:03,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663993999] [2021-06-05 15:00:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:03,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:03,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663993999] [2021-06-05 15:00:03,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663993999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:03,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710361106] [2021-06-05 15:00:03,385 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:03,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:03,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:03,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:00:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:03,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:03,646 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 [2021-06-05 15:00:03,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:03,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:03,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:03,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-06-05 15:00:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:03,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710361106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:03,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:03,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:00:03,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741025471] [2021-06-05 15:00:03,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:00:03,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:03,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:00:03,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:00:03,779 INFO L87 Difference]: Start difference. First operand 937 states and 2227 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:05,175 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-06-05 15:00:06,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:06,548 INFO L93 Difference]: Finished difference Result 2461 states and 5969 transitions. [2021-06-05 15:00:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:00:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:06,551 INFO L225 Difference]: With dead ends: 2461 [2021-06-05 15:00:06,551 INFO L226 Difference]: Without dead ends: 2441 [2021-06-05 15:00:06,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2206.6ms TimeCoverageRelationStatistics Valid=672, Invalid=2988, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:00:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-06-05 15:00:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 947. [2021-06-05 15:00:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.382663847780127) internal successors, (2254), 946 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2254 transitions. [2021-06-05 15:00:06,570 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2254 transitions. Word has length 30 [2021-06-05 15:00:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:06,570 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 2254 transitions. [2021-06-05 15:00:06,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2254 transitions. [2021-06-05 15:00:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:06,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:06,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:06,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:06,789 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:06,789 INFO L82 PathProgramCache]: Analyzing trace with hash -292888029, now seen corresponding path program 15 times [2021-06-05 15:00:06,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:06,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898289999] [2021-06-05 15:00:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:07,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:07,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898289999] [2021-06-05 15:00:07,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898289999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:07,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816142472] [2021-06-05 15:00:07,083 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:07,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:00:07,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:07,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:00:07,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:07,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:07,329 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 20 treesize of output 36 [2021-06-05 15:00:07,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:07,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:07,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:07,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-06-05 15:00:07,587 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-06-05 15:00:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:07,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816142472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:07,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:07,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:00:07,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993415755] [2021-06-05 15:00:07,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:00:07,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:00:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:00:07,623 INFO L87 Difference]: Start difference. First operand 947 states and 2254 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:08,200 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 15:00:09,075 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-05 15:00:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:10,631 INFO L93 Difference]: Finished difference Result 2339 states and 5693 transitions. [2021-06-05 15:00:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:00:10,631 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:10,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:10,634 INFO L225 Difference]: With dead ends: 2339 [2021-06-05 15:00:10,634 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 15:00:10,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2554.0ms TimeCoverageRelationStatistics Valid=562, Invalid=3098, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:00:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 15:00:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 971. [2021-06-05 15:00:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.3855670103092783) internal successors, (2314), 970 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2314 transitions. [2021-06-05 15:00:10,645 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2314 transitions. Word has length 30 [2021-06-05 15:00:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:10,645 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2314 transitions. [2021-06-05 15:00:10,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2314 transitions. [2021-06-05 15:00:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:10,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:10,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:10,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 15:00:10,847 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:10,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1463513021, now seen corresponding path program 16 times [2021-06-05 15:00:10,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:10,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662548687] [2021-06-05 15:00:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:11,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:11,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662548687] [2021-06-05 15:00:11,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662548687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:11,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413022513] [2021-06-05 15:00:11,099 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:11,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:11,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:11,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:11,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:11,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:00:11,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:11,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:11,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:11,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-06-05 15:00:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:11,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413022513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:11,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:11,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:00:11,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826729773] [2021-06-05 15:00:11,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:11,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:11,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:11,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:11,296 INFO L87 Difference]: Start difference. First operand 971 states and 2314 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:12,796 INFO L93 Difference]: Finished difference Result 2622 states and 6449 transitions. [2021-06-05 15:00:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:00:12,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:12,798 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 15:00:12,798 INFO L226 Difference]: Without dead ends: 2602 [2021-06-05 15:00:12,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1242.4ms TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:00:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-06-05 15:00:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 980. [2021-06-05 15:00:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.3861082737487234) internal successors, (2336), 979 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2336 transitions. [2021-06-05 15:00:12,811 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2336 transitions. Word has length 30 [2021-06-05 15:00:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:12,811 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 2336 transitions. [2021-06-05 15:00:12,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2336 transitions. [2021-06-05 15:00:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:12,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:12,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:13,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 15:00:13,012 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1998957229, now seen corresponding path program 17 times [2021-06-05 15:00:13,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:13,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259891440] [2021-06-05 15:00:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:13,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259891440] [2021-06-05 15:00:13,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259891440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125535405] [2021-06-05 15:00:13,251 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:13,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:00:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:13,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:13,465 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 15:00:13,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 15:00:13,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:13,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:13,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:13,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 15:00:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:13,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125535405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:13,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:13,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:13,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505787091] [2021-06-05 15:00:13,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:13,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:13,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:13,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:13,496 INFO L87 Difference]: Start difference. First operand 980 states and 2336 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:15,048 INFO L93 Difference]: Finished difference Result 2208 states and 5368 transitions. [2021-06-05 15:00:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:00:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:15,051 INFO L225 Difference]: With dead ends: 2208 [2021-06-05 15:00:15,051 INFO L226 Difference]: Without dead ends: 2188 [2021-06-05 15:00:15,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1250.5ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:00:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-06-05 15:00:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 980. [2021-06-05 15:00:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.3840653728294177) internal successors, (2334), 979 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2334 transitions. [2021-06-05 15:00:15,062 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2334 transitions. Word has length 30 [2021-06-05 15:00:15,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:15,062 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 2334 transitions. [2021-06-05 15:00:15,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:15,062 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2334 transitions. [2021-06-05 15:00:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:15,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:15,063 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:15,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 15:00:15,264 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1891263929, now seen corresponding path program 18 times [2021-06-05 15:00:15,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:15,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052760402] [2021-06-05 15:00:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:15,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:15,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052760402] [2021-06-05 15:00:15,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052760402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:15,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172841573] [2021-06-05 15:00:15,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:15,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:00:15,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:15,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:15,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:15,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:00:15,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:15,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:15,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:15,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 15:00:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:15,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172841573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:15,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:15,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:15,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033354143] [2021-06-05 15:00:15,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:15,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:15,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:15,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:15,744 INFO L87 Difference]: Start difference. First operand 980 states and 2334 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:17,326 INFO L93 Difference]: Finished difference Result 2256 states and 5482 transitions. [2021-06-05 15:00:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:00:17,327 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:17,329 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 15:00:17,329 INFO L226 Difference]: Without dead ends: 2219 [2021-06-05 15:00:17,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1200.9ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:00:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-06-05 15:00:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 971. [2021-06-05 15:00:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.3804123711340206) internal successors, (2309), 970 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2309 transitions. [2021-06-05 15:00:17,341 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2309 transitions. Word has length 30 [2021-06-05 15:00:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:17,341 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2309 transitions. [2021-06-05 15:00:17,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2309 transitions. [2021-06-05 15:00:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:17,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:17,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:17,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 15:00:17,543 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:17,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1162356301, now seen corresponding path program 19 times [2021-06-05 15:00:17,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:17,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724009291] [2021-06-05 15:00:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:17,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:17,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724009291] [2021-06-05 15:00:17,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724009291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:17,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141272282] [2021-06-05 15:00:17,755 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:17,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:17,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:17,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:00:17,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:17,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:17,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:17,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-06-05 15:00:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:17,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141272282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:17,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:17,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:00:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739168458] [2021-06-05 15:00:17,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:17,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:17,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:17,934 INFO L87 Difference]: Start difference. First operand 971 states and 2309 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:18,926 INFO L93 Difference]: Finished difference Result 2540 states and 6224 transitions. [2021-06-05 15:00:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:00:18,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:18,929 INFO L225 Difference]: With dead ends: 2540 [2021-06-05 15:00:18,929 INFO L226 Difference]: Without dead ends: 2529 [2021-06-05 15:00:18,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 779.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:00:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-06-05 15:00:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1010. [2021-06-05 15:00:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.3885034687809714) internal successors, (2410), 1009 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 2410 transitions. [2021-06-05 15:00:18,942 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 2410 transitions. Word has length 30 [2021-06-05 15:00:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:18,943 INFO L482 AbstractCegarLoop]: Abstraction has 1010 states and 2410 transitions. [2021-06-05 15:00:18,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 2410 transitions. [2021-06-05 15:00:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:18,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:18,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:19,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 15:00:19,145 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:19,146 INFO L82 PathProgramCache]: Analyzing trace with hash 594044749, now seen corresponding path program 20 times [2021-06-05 15:00:19,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:19,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960419204] [2021-06-05 15:00:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:19,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:19,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960419204] [2021-06-05 15:00:19,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960419204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:19,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929488107] [2021-06-05 15:00:19,369 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:19,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:19,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:19,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:00:19,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:19,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:19,581 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 [2021-06-05 15:00:19,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:19,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:19,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:19,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-06-05 15:00:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:19,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929488107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:19,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:19,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:00:19,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362950995] [2021-06-05 15:00:19,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:00:19,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:00:19,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:00:19,687 INFO L87 Difference]: Start difference. First operand 1010 states and 2410 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:21,021 INFO L93 Difference]: Finished difference Result 2582 states and 6364 transitions. [2021-06-05 15:00:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:00:21,022 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:21,024 INFO L225 Difference]: With dead ends: 2582 [2021-06-05 15:00:21,024 INFO L226 Difference]: Without dead ends: 2570 [2021-06-05 15:00:21,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1104.3ms TimeCoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:00:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-06-05 15:00:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1045. [2021-06-05 15:00:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.3946360153256707) internal successors, (2500), 1044 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2500 transitions. [2021-06-05 15:00:21,038 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2500 transitions. Word has length 30 [2021-06-05 15:00:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:21,038 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2500 transitions. [2021-06-05 15:00:21,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2500 transitions. [2021-06-05 15:00:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:21,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:21,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:21,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:21,239 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:21,240 INFO L82 PathProgramCache]: Analyzing trace with hash -323905441, now seen corresponding path program 21 times [2021-06-05 15:00:21,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:21,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302599648] [2021-06-05 15:00:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:21,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:21,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302599648] [2021-06-05 15:00:21,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302599648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:21,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596166870] [2021-06-05 15:00:21,445 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:21,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:00:21,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:21,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:21,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:21,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:00:21,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:21,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:21,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:21,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-06-05 15:00:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:21,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596166870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:21,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:21,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:21,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111652467] [2021-06-05 15:00:21,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:21,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:21,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:21,639 INFO L87 Difference]: Start difference. First operand 1045 states and 2500 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:23,180 INFO L93 Difference]: Finished difference Result 2927 states and 7176 transitions. [2021-06-05 15:00:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:00:23,181 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:23,184 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 15:00:23,184 INFO L226 Difference]: Without dead ends: 2905 [2021-06-05 15:00:23,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1120.7ms TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:00:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-06-05 15:00:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 991. [2021-06-05 15:00:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.3848484848484848) internal successors, (2361), 990 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2361 transitions. [2021-06-05 15:00:23,200 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2361 transitions. Word has length 30 [2021-06-05 15:00:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:23,200 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 2361 transitions. [2021-06-05 15:00:23,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2361 transitions. [2021-06-05 15:00:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:23,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:23,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:23,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:23,405 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:23,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1129488957, now seen corresponding path program 22 times [2021-06-05 15:00:23,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:23,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413962719] [2021-06-05 15:00:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:23,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:23,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413962719] [2021-06-05 15:00:23,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413962719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:23,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184197746] [2021-06-05 15:00:23,663 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:23,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:23,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:23,685 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:23,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:00:23,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:23,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:23,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:23,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 15:00:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:23,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184197746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:23,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:23,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:23,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926708583] [2021-06-05 15:00:23,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:23,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:23,873 INFO L87 Difference]: Start difference. First operand 991 states and 2361 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:24,961 INFO L93 Difference]: Finished difference Result 2295 states and 5561 transitions. [2021-06-05 15:00:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:00:24,962 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:24,964 INFO L225 Difference]: With dead ends: 2295 [2021-06-05 15:00:24,964 INFO L226 Difference]: Without dead ends: 2275 [2021-06-05 15:00:24,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 837.3ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:00:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-06-05 15:00:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 989. [2021-06-05 15:00:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.383603238866397) internal successors, (2355), 988 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2355 transitions. [2021-06-05 15:00:24,976 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2355 transitions. Word has length 30 [2021-06-05 15:00:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:24,976 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 2355 transitions. [2021-06-05 15:00:24,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2355 transitions. [2021-06-05 15:00:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:24,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:24,977 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:25,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:25,178 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:25,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:25,178 INFO L82 PathProgramCache]: Analyzing trace with hash -508083499, now seen corresponding path program 23 times [2021-06-05 15:00:25,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:25,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997689089] [2021-06-05 15:00:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:25,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:25,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997689089] [2021-06-05 15:00:25,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997689089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:25,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876487222] [2021-06-05 15:00:25,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:25,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:00:25,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:25,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:25,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:00:25,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:25,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:25,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:25,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 15:00:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:25,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876487222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:25,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:25,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:25,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139181056] [2021-06-05 15:00:25,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:25,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:25,640 INFO L87 Difference]: Start difference. First operand 989 states and 2355 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:26,771 INFO L93 Difference]: Finished difference Result 2384 states and 5767 transitions. [2021-06-05 15:00:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:00:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:26,773 INFO L225 Difference]: With dead ends: 2384 [2021-06-05 15:00:26,774 INFO L226 Difference]: Without dead ends: 2347 [2021-06-05 15:00:26,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 896.9ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:00:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-06-05 15:00:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 974. [2021-06-05 15:00:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.3802672147995887) internal successors, (2316), 973 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2316 transitions. [2021-06-05 15:00:26,790 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2316 transitions. Word has length 30 [2021-06-05 15:00:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:26,790 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 2316 transitions. [2021-06-05 15:00:26,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2316 transitions. [2021-06-05 15:00:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:26,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:26,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:26,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 15:00:26,992 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2141487853, now seen corresponding path program 24 times [2021-06-05 15:00:26,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:26,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599482051] [2021-06-05 15:00:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:27,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:27,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599482051] [2021-06-05 15:00:27,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599482051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:27,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067630702] [2021-06-05 15:00:27,331 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:00:27,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:00:27,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:27,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:27,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:27,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:00:27,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:27,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:27,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:27,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 15:00:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:27,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067630702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:27,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:27,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:27,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662299723] [2021-06-05 15:00:27,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:27,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:27,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:27,540 INFO L87 Difference]: Start difference. First operand 974 states and 2316 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:28,404 INFO L93 Difference]: Finished difference Result 2266 states and 5502 transitions. [2021-06-05 15:00:28,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:00:28,404 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:28,407 INFO L225 Difference]: With dead ends: 2266 [2021-06-05 15:00:28,407 INFO L226 Difference]: Without dead ends: 2256 [2021-06-05 15:00:28,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-06-05 15:00:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 971. [2021-06-05 15:00:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.3804123711340206) internal successors, (2309), 970 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2309 transitions. [2021-06-05 15:00:28,428 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2309 transitions. Word has length 30 [2021-06-05 15:00:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:28,428 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2309 transitions. [2021-06-05 15:00:28,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:28,428 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2309 transitions. [2021-06-05 15:00:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:28,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:28,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:28,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 15:00:28,631 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:28,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1543469255, now seen corresponding path program 1 times [2021-06-05 15:00:28,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:28,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072021918] [2021-06-05 15:00:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:28,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:28,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072021918] [2021-06-05 15:00:28,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072021918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:28,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770566961] [2021-06-05 15:00:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:28,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:29,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:00:29,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:29,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:29,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:29,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:00:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:29,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770566961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:29,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:29,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:29,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545186419] [2021-06-05 15:00:29,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:29,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:29,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:29,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:29,062 INFO L87 Difference]: Start difference. First operand 971 states and 2309 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:30,069 INFO L93 Difference]: Finished difference Result 2326 states and 5643 transitions. [2021-06-05 15:00:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:00:30,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:30,072 INFO L225 Difference]: With dead ends: 2326 [2021-06-05 15:00:30,072 INFO L226 Difference]: Without dead ends: 2316 [2021-06-05 15:00:30,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 685.9ms TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-06-05 15:00:30,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1015. [2021-06-05 15:00:30,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 2.371794871794872) internal successors, (2405), 1014 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:30,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 2405 transitions. [2021-06-05 15:00:30,085 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 2405 transitions. Word has length 30 [2021-06-05 15:00:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:30,085 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 2405 transitions. [2021-06-05 15:00:30,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 2405 transitions. [2021-06-05 15:00:30,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:30,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:30,086 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:30,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 15:00:30,287 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash 334113745, now seen corresponding path program 2 times [2021-06-05 15:00:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:30,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438933325] [2021-06-05 15:00:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:30,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:30,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438933325] [2021-06-05 15:00:30,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438933325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:30,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411498518] [2021-06-05 15:00:30,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:30,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:30,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:30,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:30,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:00:30,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:30,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:30,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:30,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:00:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:30,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411498518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:30,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:30,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:00:30,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390915132] [2021-06-05 15:00:30,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:30,716 INFO L87 Difference]: Start difference. First operand 1015 states and 2405 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:31,759 INFO L93 Difference]: Finished difference Result 2579 states and 6285 transitions. [2021-06-05 15:00:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:00:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:31,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:31,762 INFO L225 Difference]: With dead ends: 2579 [2021-06-05 15:00:31,762 INFO L226 Difference]: Without dead ends: 2568 [2021-06-05 15:00:31,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 756.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:00:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-05 15:00:31,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1049. [2021-06-05 15:00:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.3807251908396947) internal successors, (2495), 1048 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2495 transitions. [2021-06-05 15:00:31,775 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2495 transitions. Word has length 30 [2021-06-05 15:00:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:31,775 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 2495 transitions. [2021-06-05 15:00:31,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2495 transitions. [2021-06-05 15:00:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:31,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:31,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:31,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:31,976 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:31,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2090514795, now seen corresponding path program 3 times [2021-06-05 15:00:31,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:31,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024033410] [2021-06-05 15:00:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:32,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:32,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024033410] [2021-06-05 15:00:32,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024033410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:32,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328517519] [2021-06-05 15:00:32,191 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:32,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:00:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:32,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:00:32,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:32,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:32,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:00:32,476 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:00:32,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:32,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:32,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:32,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:14 [2021-06-05 15:00:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:32,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328517519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:32,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:32,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 15:00:32,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291050875] [2021-06-05 15:00:32,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:00:32,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:32,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:00:32,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:00:32,508 INFO L87 Difference]: Start difference. First operand 1049 states and 2495 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:34,137 INFO L93 Difference]: Finished difference Result 2570 states and 6285 transitions. [2021-06-05 15:00:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:00:34,137 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:34,140 INFO L225 Difference]: With dead ends: 2570 [2021-06-05 15:00:34,140 INFO L226 Difference]: Without dead ends: 2558 [2021-06-05 15:00:34,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1112.2ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:00:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-06-05 15:00:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 1049. [2021-06-05 15:00:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.37881679389313) internal successors, (2493), 1048 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2493 transitions. [2021-06-05 15:00:34,153 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2493 transitions. Word has length 30 [2021-06-05 15:00:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:34,153 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 2493 transitions. [2021-06-05 15:00:34,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2493 transitions. [2021-06-05 15:00:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:34,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:34,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:34,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 15:00:34,354 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash 519174883, now seen corresponding path program 4 times [2021-06-05 15:00:34,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:34,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230560568] [2021-06-05 15:00:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:34,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:34,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230560568] [2021-06-05 15:00:34,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230560568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:34,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724431317] [2021-06-05 15:00:34,575 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:34,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:34,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:34,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:34,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:00:34,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:34,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:34,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:34,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:00:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:34,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724431317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:34,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:34,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:34,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403215172] [2021-06-05 15:00:34,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:34,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:34,777 INFO L87 Difference]: Start difference. First operand 1049 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:35,781 INFO L93 Difference]: Finished difference Result 2493 states and 6029 transitions. [2021-06-05 15:00:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:00:35,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:35,784 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 15:00:35,784 INFO L226 Difference]: Without dead ends: 2471 [2021-06-05 15:00:35,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 810.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:00:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-06-05 15:00:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1046. [2021-06-05 15:00:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.3779904306220097) internal successors, (2485), 1045 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 2485 transitions. [2021-06-05 15:00:35,797 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 2485 transitions. Word has length 30 [2021-06-05 15:00:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:35,797 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 2485 transitions. [2021-06-05 15:00:35,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 2485 transitions. [2021-06-05 15:00:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:35,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:35,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:36,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:36,013 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash -794070141, now seen corresponding path program 5 times [2021-06-05 15:00:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:36,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052462033] [2021-06-05 15:00:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:36,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:36,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052462033] [2021-06-05 15:00:36,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052462033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:36,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135373911] [2021-06-05 15:00:36,241 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:36,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:00:36,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:36,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:36,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:36,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:00:36,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:36,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:36,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:36,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:00:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:36,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135373911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:36,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:36,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:36,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286196541] [2021-06-05 15:00:36,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:36,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:36,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:36,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:36,448 INFO L87 Difference]: Start difference. First operand 1046 states and 2485 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:37,523 INFO L93 Difference]: Finished difference Result 2312 states and 5616 transitions. [2021-06-05 15:00:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:00:37,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:37,526 INFO L225 Difference]: With dead ends: 2312 [2021-06-05 15:00:37,526 INFO L226 Difference]: Without dead ends: 2302 [2021-06-05 15:00:37,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 682.9ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-06-05 15:00:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1045. [2021-06-05 15:00:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.378352490421456) internal successors, (2483), 1044 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2483 transitions. [2021-06-05 15:00:37,539 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2483 transitions. Word has length 30 [2021-06-05 15:00:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:37,539 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2483 transitions. [2021-06-05 15:00:37,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2483 transitions. [2021-06-05 15:00:37,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:37,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:37,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:37,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:37,740 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:37,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:37,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1395219345, now seen corresponding path program 6 times [2021-06-05 15:00:37,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:37,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302409120] [2021-06-05 15:00:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:38,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302409120] [2021-06-05 15:00:38,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302409120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639808446] [2021-06-05 15:00:38,002 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:38,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:00:38,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:38,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:00:38,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:38,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:38,216 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 25 treesize of output 31 [2021-06-05 15:00:38,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:00:38,276 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.9 percent of original size [2021-06-05 15:00:38,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:38,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:60 [2021-06-05 15:00:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:38,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639808446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:38,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:38,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-06-05 15:00:38,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502989146] [2021-06-05 15:00:38,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:00:38,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:38,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:00:38,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:00:38,411 INFO L87 Difference]: Start difference. First operand 1045 states and 2483 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:40,343 INFO L93 Difference]: Finished difference Result 3125 states and 7618 transitions. [2021-06-05 15:00:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:00:40,344 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:40,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:40,346 INFO L225 Difference]: With dead ends: 3125 [2021-06-05 15:00:40,347 INFO L226 Difference]: Without dead ends: 3111 [2021-06-05 15:00:40,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1624.2ms TimeCoverageRelationStatistics Valid=548, Invalid=2002, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:00:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-06-05 15:00:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1038. [2021-06-05 15:00:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 2.3751205400192865) internal successors, (2463), 1037 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2463 transitions. [2021-06-05 15:00:40,361 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2463 transitions. Word has length 30 [2021-06-05 15:00:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:40,361 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 2463 transitions. [2021-06-05 15:00:40,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2463 transitions. [2021-06-05 15:00:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:40,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:40,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:40,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:40,562 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash 316882413, now seen corresponding path program 7 times [2021-06-05 15:00:40,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:40,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889135218] [2021-06-05 15:00:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:40,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:40,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889135218] [2021-06-05 15:00:40,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889135218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:40,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717098216] [2021-06-05 15:00:40,785 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:40,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:40,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:00:40,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:40,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:40,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:40,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:00:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:40,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717098216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:40,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:40,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:40,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662942346] [2021-06-05 15:00:40,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:40,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:40,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:40,994 INFO L87 Difference]: Start difference. First operand 1038 states and 2463 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:41,908 INFO L93 Difference]: Finished difference Result 2535 states and 6141 transitions. [2021-06-05 15:00:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:00:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:41,911 INFO L225 Difference]: With dead ends: 2535 [2021-06-05 15:00:41,911 INFO L226 Difference]: Without dead ends: 2517 [2021-06-05 15:00:41,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 780.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:00:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-06-05 15:00:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1015. [2021-06-05 15:00:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 2.371794871794872) internal successors, (2405), 1014 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 2405 transitions. [2021-06-05 15:00:41,924 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 2405 transitions. Word has length 30 [2021-06-05 15:00:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:41,924 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 2405 transitions. [2021-06-05 15:00:41,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 2405 transitions. [2021-06-05 15:00:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:41,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:41,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:42,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 15:00:42,126 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:42,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2074262811, now seen corresponding path program 8 times [2021-06-05 15:00:42,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:42,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147963845] [2021-06-05 15:00:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:42,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:42,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147963845] [2021-06-05 15:00:42,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147963845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:42,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018141219] [2021-06-05 15:00:42,327 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:42,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:42,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:42,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:00:42,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:42,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:42,554 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 25 treesize of output 31 [2021-06-05 15:00:42,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:00:42,593 INFO L628 ElimStorePlain]: treesize reduction 8, result has 86.7 percent of original size [2021-06-05 15:00:42,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:42,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:52 [2021-06-05 15:00:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:42,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018141219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:42,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:42,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:00:42,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026801704] [2021-06-05 15:00:42,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:00:42,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:42,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:00:42,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:00:42,690 INFO L87 Difference]: Start difference. First operand 1015 states and 2405 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:43,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:43,756 INFO L93 Difference]: Finished difference Result 2436 states and 5950 transitions. [2021-06-05 15:00:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:00:43,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:43,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:43,759 INFO L225 Difference]: With dead ends: 2436 [2021-06-05 15:00:43,759 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 15:00:43,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 937.2ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:00:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 15:00:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1050. [2021-06-05 15:00:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.380362249761678) internal successors, (2497), 1049 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2497 transitions. [2021-06-05 15:00:43,773 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2497 transitions. Word has length 30 [2021-06-05 15:00:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:43,773 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 2497 transitions. [2021-06-05 15:00:43,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2497 transitions. [2021-06-05 15:00:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:43,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:43,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:43,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:43,989 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash -317861761, now seen corresponding path program 9 times [2021-06-05 15:00:43,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:43,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353106572] [2021-06-05 15:00:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:44,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:44,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353106572] [2021-06-05 15:00:44,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353106572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:44,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082301155] [2021-06-05 15:00:44,194 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:44,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:00:44,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:44,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:44,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:00:44,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:44,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:44,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:44,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:00:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:44,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082301155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:44,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:44,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:00:44,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183332655] [2021-06-05 15:00:44,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:44,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:44,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:44,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:44,405 INFO L87 Difference]: Start difference. First operand 1050 states and 2497 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:45,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:45,562 INFO L93 Difference]: Finished difference Result 2686 states and 6580 transitions. [2021-06-05 15:00:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:00:45,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:45,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:45,565 INFO L225 Difference]: With dead ends: 2686 [2021-06-05 15:00:45,565 INFO L226 Difference]: Without dead ends: 2666 [2021-06-05 15:00:45,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 861.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:00:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-05 15:00:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 1034. [2021-06-05 15:00:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.3756050338818975) internal successors, (2454), 1033 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:45,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2454 transitions. [2021-06-05 15:00:45,578 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2454 transitions. Word has length 30 [2021-06-05 15:00:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:45,578 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 2454 transitions. [2021-06-05 15:00:45,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2454 transitions. [2021-06-05 15:00:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:45,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:45,580 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:45,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:45,780 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:45,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1889201673, now seen corresponding path program 10 times [2021-06-05 15:00:45,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:45,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801142324] [2021-06-05 15:00:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:46,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:46,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801142324] [2021-06-05 15:00:46,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801142324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:46,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784304769] [2021-06-05 15:00:46,022 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:00:46,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:46,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:46,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:46,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:00:46,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:46,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:46,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:46,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:00:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:46,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784304769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:46,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:46,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:46,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837111708] [2021-06-05 15:00:46,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:46,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:46,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:46,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:46,257 INFO L87 Difference]: Start difference. First operand 1034 states and 2454 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:47,504 INFO L93 Difference]: Finished difference Result 2442 states and 5915 transitions. [2021-06-05 15:00:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:00:47,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:47,507 INFO L225 Difference]: With dead ends: 2442 [2021-06-05 15:00:47,507 INFO L226 Difference]: Without dead ends: 2419 [2021-06-05 15:00:47,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 929.8ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:00:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-06-05 15:00:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1019. [2021-06-05 15:00:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.3713163064833007) internal successors, (2414), 1018 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2414 transitions. [2021-06-05 15:00:47,520 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2414 transitions. Word has length 30 [2021-06-05 15:00:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:47,520 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 2414 transitions. [2021-06-05 15:00:47,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2414 transitions. [2021-06-05 15:00:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:47,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:47,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:47,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 15:00:47,733 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1092520599, now seen corresponding path program 11 times [2021-06-05 15:00:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:47,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599007561] [2021-06-05 15:00:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:47,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:47,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599007561] [2021-06-05 15:00:47,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599007561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:47,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687888371] [2021-06-05 15:00:47,985 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:48,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:00:48,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:48,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:48,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:48,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:00:48,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:48,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:48,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:48,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:00:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:48,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687888371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:48,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:48,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:00:48,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732520992] [2021-06-05 15:00:48,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:00:48,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:48,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:00:48,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:48,203 INFO L87 Difference]: Start difference. First operand 1019 states and 2414 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:49,059 INFO L93 Difference]: Finished difference Result 2279 states and 5538 transitions. [2021-06-05 15:00:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:00:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:49,062 INFO L225 Difference]: With dead ends: 2279 [2021-06-05 15:00:49,062 INFO L226 Difference]: Without dead ends: 2269 [2021-06-05 15:00:49,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 753.3ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:00:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-06-05 15:00:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1016. [2021-06-05 15:00:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.3714285714285714) internal successors, (2407), 1015 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2407 transitions. [2021-06-05 15:00:49,075 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2407 transitions. Word has length 30 [2021-06-05 15:00:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:49,075 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 2407 transitions. [2021-06-05 15:00:49,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2407 transitions. [2021-06-05 15:00:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:49,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:49,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:49,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 15:00:49,297 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1905442861, now seen corresponding path program 12 times [2021-06-05 15:00:49,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:49,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462037732] [2021-06-05 15:00:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:49,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:49,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462037732] [2021-06-05 15:00:49,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462037732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:49,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432004847] [2021-06-05 15:00:49,560 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:00:49,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:00:49,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:49,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:00:49,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:49,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:49,781 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 25 treesize of output 31 [2021-06-05 15:00:49,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:00:49,828 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-06-05 15:00:49,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:49,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-06-05 15:00:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:49,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432004847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:49,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:49,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:00:49,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569506354] [2021-06-05 15:00:49,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:00:49,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:49,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:00:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:00:49,957 INFO L87 Difference]: Start difference. First operand 1016 states and 2407 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:51,594 INFO L93 Difference]: Finished difference Result 2411 states and 5871 transitions. [2021-06-05 15:00:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:00:51,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:51,597 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 15:00:51,597 INFO L226 Difference]: Without dead ends: 2400 [2021-06-05 15:00:51,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1341.5ms TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:00:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-05 15:00:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1040. [2021-06-05 15:00:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.3753609239653515) internal successors, (2468), 1039 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2468 transitions. [2021-06-05 15:00:51,610 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2468 transitions. Word has length 30 [2021-06-05 15:00:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:51,610 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 2468 transitions. [2021-06-05 15:00:51,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2468 transitions. [2021-06-05 15:00:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:51,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:51,611 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:51,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:51,821 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -633123385, now seen corresponding path program 13 times [2021-06-05 15:00:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:51,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965183497] [2021-06-05 15:00:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:52,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:52,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965183497] [2021-06-05 15:00:52,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965183497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:52,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325236934] [2021-06-05 15:00:52,088 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:52,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:00:52,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:52,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:00:52,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:52,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:52,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:52,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:00:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:52,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325236934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:52,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:52,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:00:52,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712314070] [2021-06-05 15:00:52,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:00:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:00:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:52,276 INFO L87 Difference]: Start difference. First operand 1040 states and 2468 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:53,576 INFO L93 Difference]: Finished difference Result 2592 states and 6361 transitions. [2021-06-05 15:00:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:00:53,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:53,579 INFO L225 Difference]: With dead ends: 2592 [2021-06-05 15:00:53,579 INFO L226 Difference]: Without dead ends: 2572 [2021-06-05 15:00:53,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1085.0ms TimeCoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:00:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-06-05 15:00:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1028. [2021-06-05 15:00:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.372930866601753) internal successors, (2437), 1027 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2437 transitions. [2021-06-05 15:00:53,592 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2437 transitions. Word has length 30 [2021-06-05 15:00:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:53,592 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 2437 transitions. [2021-06-05 15:00:53,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2437 transitions. [2021-06-05 15:00:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:53,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:53,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:53,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:53,809 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:53,809 INFO L82 PathProgramCache]: Analyzing trace with hash 895830683, now seen corresponding path program 14 times [2021-06-05 15:00:53,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:53,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200041187] [2021-06-05 15:00:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:54,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:54,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200041187] [2021-06-05 15:00:54,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200041187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:54,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469502243] [2021-06-05 15:00:54,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:54,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:54,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:54,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:00:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:54,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:54,316 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 28 treesize of output 32 [2021-06-05 15:00:54,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:54,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:54,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:54,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-06-05 15:00:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:54,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469502243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:54,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:54,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:00:54,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630298417] [2021-06-05 15:00:54,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:00:54,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:54,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:00:54,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:00:54,407 INFO L87 Difference]: Start difference. First operand 1028 states and 2437 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:56,223 INFO L93 Difference]: Finished difference Result 2575 states and 6256 transitions. [2021-06-05 15:00:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:00:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:56,225 INFO L225 Difference]: With dead ends: 2575 [2021-06-05 15:00:56,225 INFO L226 Difference]: Without dead ends: 2555 [2021-06-05 15:00:56,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1638.1ms TimeCoverageRelationStatistics Valid=590, Invalid=2166, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:00:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-06-05 15:00:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1019. [2021-06-05 15:00:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.3713163064833007) internal successors, (2414), 1018 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2414 transitions. [2021-06-05 15:00:56,238 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2414 transitions. Word has length 30 [2021-06-05 15:00:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:56,239 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 2414 transitions. [2021-06-05 15:00:56,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2414 transitions. [2021-06-05 15:00:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:56,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:56,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:56,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-06-05 15:00:56,440 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:56,440 INFO L82 PathProgramCache]: Analyzing trace with hash 578985487, now seen corresponding path program 15 times [2021-06-05 15:00:56,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:56,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127811474] [2021-06-05 15:00:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:56,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:56,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127811474] [2021-06-05 15:00:56,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127811474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:56,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449106702] [2021-06-05 15:00:56,696 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:56,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:00:56,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:56,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:00:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:56,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:56,847 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 20 treesize of output 36 [2021-06-05 15:00:56,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:56,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:56,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:56,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-06-05 15:00:57,273 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-06-05 15:00:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:57,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449106702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:57,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:57,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:00:57,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042339294] [2021-06-05 15:00:57,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:00:57,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:00:57,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:00:57,312 INFO L87 Difference]: Start difference. First operand 1019 states and 2414 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:58,853 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-06-05 15:00:59,419 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 15:00:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:59,643 INFO L93 Difference]: Finished difference Result 2304 states and 5623 transitions. [2021-06-05 15:00:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:00:59,643 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:00:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:59,646 INFO L225 Difference]: With dead ends: 2304 [2021-06-05 15:00:59,646 INFO L226 Difference]: Without dead ends: 2293 [2021-06-05 15:00:59,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2280.9ms TimeCoverageRelationStatistics Valid=421, Invalid=2441, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:00:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-06-05 15:00:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1032. [2021-06-05 15:00:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.372453928225024) internal successors, (2446), 1031 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 2446 transitions. [2021-06-05 15:00:59,658 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 2446 transitions. Word has length 30 [2021-06-05 15:00:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:59,658 INFO L482 AbstractCegarLoop]: Abstraction has 1032 states and 2446 transitions. [2021-06-05 15:00:59,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 2446 transitions. [2021-06-05 15:00:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:00:59,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:59,659 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:59,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:59,859 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1959580759, now seen corresponding path program 16 times [2021-06-05 15:00:59,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:59,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131529911] [2021-06-05 15:00:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:00,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:00,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131529911] [2021-06-05 15:01:00,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131529911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:00,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775836966] [2021-06-05 15:01:00,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:00,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:00,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:00,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:00,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:00,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:00,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:00,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:00,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:00,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775836966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:00,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:00,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:01:00,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458346029] [2021-06-05 15:01:00,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:00,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:00,300 INFO L87 Difference]: Start difference. First operand 1032 states and 2446 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:01,703 INFO L93 Difference]: Finished difference Result 2584 states and 6335 transitions. [2021-06-05 15:01:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:01:01,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:01,706 INFO L225 Difference]: With dead ends: 2584 [2021-06-05 15:01:01,706 INFO L226 Difference]: Without dead ends: 2564 [2021-06-05 15:01:01,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1190.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:01:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-06-05 15:01:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1022. [2021-06-05 15:01:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.3712047012732613) internal successors, (2421), 1021 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2421 transitions. [2021-06-05 15:01:01,719 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2421 transitions. Word has length 30 [2021-06-05 15:01:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:01,719 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 2421 transitions. [2021-06-05 15:01:01,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2421 transitions. [2021-06-05 15:01:01,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:01,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:01,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:01,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:01,920 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:01,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1735151381, now seen corresponding path program 17 times [2021-06-05 15:01:01,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:01,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471380092] [2021-06-05 15:01:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:02,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:02,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471380092] [2021-06-05 15:01:02,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471380092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:02,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229753839] [2021-06-05 15:01:02,149 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:02,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:01:02,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:02,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:02,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:02,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:02,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:02,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:02,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:02,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:02,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229753839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:02,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:02,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:01:02,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55883187] [2021-06-05 15:01:02,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:02,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:02,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:02,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:02,346 INFO L87 Difference]: Start difference. First operand 1022 states and 2421 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:04,227 INFO L93 Difference]: Finished difference Result 2728 states and 6710 transitions. [2021-06-05 15:01:04,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:01:04,227 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:04,230 INFO L225 Difference]: With dead ends: 2728 [2021-06-05 15:01:04,230 INFO L226 Difference]: Without dead ends: 2718 [2021-06-05 15:01:04,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1413.8ms TimeCoverageRelationStatistics Valid=392, Invalid=2158, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:01:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2021-06-05 15:01:04,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 1022. [2021-06-05 15:01:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.3712047012732613) internal successors, (2421), 1021 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2421 transitions. [2021-06-05 15:01:04,243 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2421 transitions. Word has length 30 [2021-06-05 15:01:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:04,243 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 2421 transitions. [2021-06-05 15:01:04,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2421 transitions. [2021-06-05 15:01:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:04,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:04,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:04,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:04,444 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:04,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1845604843, now seen corresponding path program 18 times [2021-06-05 15:01:04,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:04,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217852623] [2021-06-05 15:01:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:04,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217852623] [2021-06-05 15:01:04,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217852623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547691478] [2021-06-05 15:01:04,665 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:04,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:01:04,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:04,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:01:04,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:04,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:04,873 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 25 treesize of output 31 [2021-06-05 15:01:04,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:01:04,908 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 15:01:04,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:04,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-06-05 15:01:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:04,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547691478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:04,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:04,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 15:01:04,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728416323] [2021-06-05 15:01:04,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:01:04,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:04,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:01:04,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:01:04,997 INFO L87 Difference]: Start difference. First operand 1022 states and 2421 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:07,541 INFO L93 Difference]: Finished difference Result 2314 states and 5640 transitions. [2021-06-05 15:01:07,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:01:07,542 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:07,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:07,544 INFO L225 Difference]: With dead ends: 2314 [2021-06-05 15:01:07,544 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 15:01:07,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1672.0ms TimeCoverageRelationStatistics Valid=347, Invalid=3075, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:01:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 15:01:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1021. [2021-06-05 15:01:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.3715686274509804) internal successors, (2419), 1020 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2419 transitions. [2021-06-05 15:01:07,556 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2419 transitions. Word has length 30 [2021-06-05 15:01:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:07,556 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 2419 transitions. [2021-06-05 15:01:07,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2419 transitions. [2021-06-05 15:01:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:07,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:07,557 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:07,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:07,772 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:07,772 INFO L82 PathProgramCache]: Analyzing trace with hash -462514351, now seen corresponding path program 19 times [2021-06-05 15:01:07,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:07,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547978272] [2021-06-05 15:01:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:07,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:07,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547978272] [2021-06-05 15:01:07,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547978272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:07,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464157104] [2021-06-05 15:01:07,994 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:08,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:08,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:08,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:08,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:08,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:08,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:08,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:01:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:08,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464157104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:08,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:08,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 15:01:08,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845240617] [2021-06-05 15:01:08,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:08,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:08,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:08,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:08,201 INFO L87 Difference]: Start difference. First operand 1021 states and 2419 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:09,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:09,850 INFO L93 Difference]: Finished difference Result 2365 states and 5774 transitions. [2021-06-05 15:01:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:01:09,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:09,853 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 15:01:09,853 INFO L226 Difference]: Without dead ends: 2356 [2021-06-05 15:01:09,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1048.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:01:09,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-05 15:01:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1036. [2021-06-05 15:01:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.373913043478261) internal successors, (2457), 1035 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2457 transitions. [2021-06-05 15:01:09,865 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2457 transitions. Word has length 30 [2021-06-05 15:01:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:09,865 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2457 transitions. [2021-06-05 15:01:09,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2457 transitions. [2021-06-05 15:01:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:09,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:09,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:10,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 15:01:10,079 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:10,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:10,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1155554699, now seen corresponding path program 20 times [2021-06-05 15:01:10,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:10,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647724050] [2021-06-05 15:01:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:10,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:10,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647724050] [2021-06-05 15:01:10,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647724050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:10,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051625628] [2021-06-05 15:01:10,327 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:10,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:10,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:10,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:10,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:10,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:10,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:10,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:10,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:10,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:10,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051625628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:10,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:10,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:01:10,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702466391] [2021-06-05 15:01:10,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:10,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:10,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:10,514 INFO L87 Difference]: Start difference. First operand 1036 states and 2457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:12,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:12,120 INFO L93 Difference]: Finished difference Result 2424 states and 5947 transitions. [2021-06-05 15:01:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:01:12,121 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:12,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:12,123 INFO L225 Difference]: With dead ends: 2424 [2021-06-05 15:01:12,123 INFO L226 Difference]: Without dead ends: 2413 [2021-06-05 15:01:12,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1186.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:01:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-06-05 15:01:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1051. [2021-06-05 15:01:12,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 2.375238095238095) internal successors, (2494), 1050 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2494 transitions. [2021-06-05 15:01:12,135 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2494 transitions. Word has length 30 [2021-06-05 15:01:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:12,135 INFO L482 AbstractCegarLoop]: Abstraction has 1051 states and 2494 transitions. [2021-06-05 15:01:12,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2494 transitions. [2021-06-05 15:01:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:12,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:12,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:12,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:12,337 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:12,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1820757867, now seen corresponding path program 21 times [2021-06-05 15:01:12,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:12,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267021398] [2021-06-05 15:01:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:12,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267021398] [2021-06-05 15:01:12,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267021398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015357649] [2021-06-05 15:01:12,578 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:12,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:01:12,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:12,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:12,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:12,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:12,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:12,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015357649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:12,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:12,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:01:12,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951255415] [2021-06-05 15:01:12,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:12,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:12,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:12,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:12,764 INFO L87 Difference]: Start difference. First operand 1051 states and 2494 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:14,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:14,359 INFO L93 Difference]: Finished difference Result 2535 states and 6230 transitions. [2021-06-05 15:01:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:01:14,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:14,361 INFO L225 Difference]: With dead ends: 2535 [2021-06-05 15:01:14,361 INFO L226 Difference]: Without dead ends: 2515 [2021-06-05 15:01:14,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1227.5ms TimeCoverageRelationStatistics Valid=342, Invalid=1914, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:01:14,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-06-05 15:01:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1039. [2021-06-05 15:01:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.373795761078998) internal successors, (2464), 1038 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2464 transitions. [2021-06-05 15:01:14,375 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2464 transitions. Word has length 30 [2021-06-05 15:01:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:14,375 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 2464 transitions. [2021-06-05 15:01:14,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2464 transitions. [2021-06-05 15:01:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:14,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:14,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:14,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 15:01:14,577 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1475956119, now seen corresponding path program 22 times [2021-06-05 15:01:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:14,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916355668] [2021-06-05 15:01:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:14,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:14,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916355668] [2021-06-05 15:01:14,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916355668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:14,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428803055] [2021-06-05 15:01:14,807 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:14,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:14,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:14,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:14,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:14,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:14,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:14,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:01:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:15,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428803055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:15,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:15,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 15:01:15,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758571282] [2021-06-05 15:01:15,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:15,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:15,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:15,017 INFO L87 Difference]: Start difference. First operand 1039 states and 2464 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:16,646 INFO L93 Difference]: Finished difference Result 2343 states and 5723 transitions. [2021-06-05 15:01:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:01:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:16,649 INFO L225 Difference]: With dead ends: 2343 [2021-06-05 15:01:16,649 INFO L226 Difference]: Without dead ends: 2334 [2021-06-05 15:01:16,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1134.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:01:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-06-05 15:01:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1033. [2021-06-05 15:01:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.374031007751938) internal successors, (2450), 1032 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2450 transitions. [2021-06-05 15:01:16,664 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2450 transitions. Word has length 30 [2021-06-05 15:01:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:16,664 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2450 transitions. [2021-06-05 15:01:16,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:16,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2450 transitions. [2021-06-05 15:01:16,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:16,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:16,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:16,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:16,865 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:16,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:16,866 INFO L82 PathProgramCache]: Analyzing trace with hash 309204733, now seen corresponding path program 23 times [2021-06-05 15:01:16,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:16,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167230661] [2021-06-05 15:01:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:17,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:17,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167230661] [2021-06-05 15:01:17,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167230661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:17,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452410125] [2021-06-05 15:01:17,125 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:17,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:01:17,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:17,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:17,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:17,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:17,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:17,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:17,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:17,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452410125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:17,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:17,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:01:17,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932837822] [2021-06-05 15:01:17,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:17,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:17,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:17,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:17,299 INFO L87 Difference]: Start difference. First operand 1033 states and 2450 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:18,494 INFO L93 Difference]: Finished difference Result 2466 states and 6019 transitions. [2021-06-05 15:01:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:01:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:18,498 INFO L225 Difference]: With dead ends: 2466 [2021-06-05 15:01:18,498 INFO L226 Difference]: Without dead ends: 2455 [2021-06-05 15:01:18,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 871.1ms TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:01:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-05 15:01:18,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1057. [2021-06-05 15:01:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.377840909090909) internal successors, (2511), 1056 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2511 transitions. [2021-06-05 15:01:18,511 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2511 transitions. Word has length 30 [2021-06-05 15:01:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:18,511 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 2511 transitions. [2021-06-05 15:01:18,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2511 transitions. [2021-06-05 15:01:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:18,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:18,512 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:18,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 15:01:18,713 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2065605783, now seen corresponding path program 24 times [2021-06-05 15:01:18,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:18,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471396169] [2021-06-05 15:01:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:18,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:18,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471396169] [2021-06-05 15:01:18,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471396169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:18,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820846421] [2021-06-05 15:01:18,999 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:19,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:01:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:19,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:01:19,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:19,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:19,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:19,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:19,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:19,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:19,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820846421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:19,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:19,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:01:19,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812709975] [2021-06-05 15:01:19,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:19,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:19,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:19,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:19,184 INFO L87 Difference]: Start difference. First operand 1057 states and 2511 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:20,694 INFO L93 Difference]: Finished difference Result 2596 states and 6370 transitions. [2021-06-05 15:01:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:01:20,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:20,696 INFO L225 Difference]: With dead ends: 2596 [2021-06-05 15:01:20,697 INFO L226 Difference]: Without dead ends: 2576 [2021-06-05 15:01:20,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1096.3ms TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:01:20,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-05 15:01:20,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1045. [2021-06-05 15:01:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.375478927203065) internal successors, (2480), 1044 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2480 transitions. [2021-06-05 15:01:20,709 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2480 transitions. Word has length 30 [2021-06-05 15:01:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:20,709 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2480 transitions. [2021-06-05 15:01:20,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2480 transitions. [2021-06-05 15:01:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:20,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:20,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:20,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-06-05 15:01:20,911 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:20,911 INFO L82 PathProgramCache]: Analyzing trace with hash -700407445, now seen corresponding path program 25 times [2021-06-05 15:01:20,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:20,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960878548] [2021-06-05 15:01:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:21,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960878548] [2021-06-05 15:01:21,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960878548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:21,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551829585] [2021-06-05 15:01:21,183 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:21,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:21,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:01:21,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:21,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:21,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:21,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:01:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:21,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551829585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:21,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:21,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:01:21,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312413531] [2021-06-05 15:01:21,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:21,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:21,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:21,378 INFO L87 Difference]: Start difference. First operand 1045 states and 2480 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:22,749 INFO L93 Difference]: Finished difference Result 2258 states and 5490 transitions. [2021-06-05 15:01:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:01:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:22,751 INFO L225 Difference]: With dead ends: 2258 [2021-06-05 15:01:22,751 INFO L226 Difference]: Without dead ends: 2235 [2021-06-05 15:01:22,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1079.7ms TimeCoverageRelationStatistics Valid=355, Invalid=1285, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:01:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-06-05 15:01:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1036. [2021-06-05 15:01:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.373913043478261) internal successors, (2457), 1035 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2457 transitions. [2021-06-05 15:01:22,763 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2457 transitions. Word has length 30 [2021-06-05 15:01:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:22,763 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2457 transitions. [2021-06-05 15:01:22,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2457 transitions. [2021-06-05 15:01:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:22,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:22,764 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:22,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:22,969 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash 373838239, now seen corresponding path program 26 times [2021-06-05 15:01:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:22,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96967959] [2021-06-05 15:01:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:23,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:23,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96967959] [2021-06-05 15:01:23,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96967959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:23,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636724801] [2021-06-05 15:01:23,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:23,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:23,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:23,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:01:23,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:23,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:23,416 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 25 treesize of output 31 [2021-06-05 15:01:23,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:01:23,460 INFO L628 ElimStorePlain]: treesize reduction 8, result has 87.3 percent of original size [2021-06-05 15:01:23,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:23,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:55 [2021-06-05 15:01:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:23,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636724801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:23,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:23,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:01:23,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823007739] [2021-06-05 15:01:23,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:01:23,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:23,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:01:23,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:01:23,594 INFO L87 Difference]: Start difference. First operand 1036 states and 2457 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:24,790 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-05 15:01:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:25,415 INFO L93 Difference]: Finished difference Result 2392 states and 5841 transitions. [2021-06-05 15:01:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:01:25,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:25,417 INFO L225 Difference]: With dead ends: 2392 [2021-06-05 15:01:25,418 INFO L226 Difference]: Without dead ends: 2381 [2021-06-05 15:01:25,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1499.1ms TimeCoverageRelationStatistics Valid=407, Invalid=1849, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:01:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-06-05 15:01:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1057. [2021-06-05 15:01:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.375) internal successors, (2508), 1056 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2508 transitions. [2021-06-05 15:01:25,429 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2508 transitions. Word has length 30 [2021-06-05 15:01:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:25,429 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 2508 transitions. [2021-06-05 15:01:25,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2508 transitions. [2021-06-05 15:01:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:25,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:25,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:25,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 15:01:25,631 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2130239289, now seen corresponding path program 27 times [2021-06-05 15:01:25,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:25,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346104299] [2021-06-05 15:01:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:25,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:25,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346104299] [2021-06-05 15:01:25,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346104299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:25,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787045314] [2021-06-05 15:01:25,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:25,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:01:25,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:25,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:01:25,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:26,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:26,067 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 20 treesize of output 36 [2021-06-05 15:01:26,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:26,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:26,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:26,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-06-05 15:01:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:26,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787045314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:26,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:26,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:01:26,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523055817] [2021-06-05 15:01:26,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:01:26,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:01:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:01:26,470 INFO L87 Difference]: Start difference. First operand 1057 states and 2508 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:27,154 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 15:01:28,095 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 15:01:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:29,221 INFO L93 Difference]: Finished difference Result 2521 states and 6168 transitions. [2021-06-05 15:01:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:01:29,222 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:29,224 INFO L225 Difference]: With dead ends: 2521 [2021-06-05 15:01:29,224 INFO L226 Difference]: Without dead ends: 2508 [2021-06-05 15:01:29,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2586.2ms TimeCoverageRelationStatistics Valid=538, Invalid=2768, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:01:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-06-05 15:01:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 1053. [2021-06-05 15:01:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.3745247148288975) internal successors, (2498), 1052 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2498 transitions. [2021-06-05 15:01:29,237 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2498 transitions. Word has length 30 [2021-06-05 15:01:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:29,237 INFO L482 AbstractCegarLoop]: Abstraction has 1053 states and 2498 transitions. [2021-06-05 15:01:29,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2498 transitions. [2021-06-05 15:01:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:29,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:29,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:29,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:29,439 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:29,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1212289099, now seen corresponding path program 28 times [2021-06-05 15:01:29,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:29,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628786929] [2021-06-05 15:01:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:29,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:29,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628786929] [2021-06-05 15:01:29,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628786929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:29,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796320883] [2021-06-05 15:01:29,724 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:29,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:29,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:29,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:29,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:29,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:29,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:29,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:29,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:29,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:29,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796320883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:29,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:29,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:01:29,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427834498] [2021-06-05 15:01:29,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:29,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:29,914 INFO L87 Difference]: Start difference. First operand 1053 states and 2498 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:32,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:32,020 INFO L93 Difference]: Finished difference Result 2872 states and 7002 transitions. [2021-06-05 15:01:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:01:32,020 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:32,023 INFO L225 Difference]: With dead ends: 2872 [2021-06-05 15:01:32,023 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 15:01:32,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1621.1ms TimeCoverageRelationStatistics Valid=613, Invalid=2693, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:01:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 15:01:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1048. [2021-06-05 15:01:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.373447946513849) internal successors, (2485), 1047 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2485 transitions. [2021-06-05 15:01:32,036 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2485 transitions. Word has length 30 [2021-06-05 15:01:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:32,037 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 2485 transitions. [2021-06-05 15:01:32,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2485 transitions. [2021-06-05 15:01:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:32,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:32,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:32,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 15:01:32,238 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:32,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:32,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1530004133, now seen corresponding path program 29 times [2021-06-05 15:01:32,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:32,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250969702] [2021-06-05 15:01:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:32,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:32,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250969702] [2021-06-05 15:01:32,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250969702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:32,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444420784] [2021-06-05 15:01:32,487 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:32,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:01:32,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:32,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:32,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:32,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:32,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:32,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:32,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:32,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:32,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444420784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:32,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:32,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:01:32,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320078549] [2021-06-05 15:01:32,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:32,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:32,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:32,663 INFO L87 Difference]: Start difference. First operand 1048 states and 2485 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:34,518 INFO L93 Difference]: Finished difference Result 2791 states and 6868 transitions. [2021-06-05 15:01:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:01:34,521 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:34,524 INFO L225 Difference]: With dead ends: 2791 [2021-06-05 15:01:34,524 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 15:01:34,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1407.5ms TimeCoverageRelationStatistics Valid=418, Invalid=2132, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:01:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 15:01:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 1039. [2021-06-05 15:01:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.373795761078998) internal successors, (2464), 1038 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2464 transitions. [2021-06-05 15:01:34,538 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2464 transitions. Word has length 30 [2021-06-05 15:01:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:34,538 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 2464 transitions. [2021-06-05 15:01:34,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2464 transitions. [2021-06-05 15:01:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:34,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:34,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:34,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:34,739 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2050752091, now seen corresponding path program 30 times [2021-06-05 15:01:34,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:34,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078973807] [2021-06-05 15:01:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:34,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:34,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078973807] [2021-06-05 15:01:34,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078973807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:34,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334762867] [2021-06-05 15:01:34,972 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:34,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:01:34,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:34,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:01:34,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:35,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:35,176 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 25 treesize of output 31 [2021-06-05 15:01:35,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:01:35,208 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 15:01:35,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:35,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-06-05 15:01:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:35,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334762867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:35,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:35,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 15:01:35,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461194389] [2021-06-05 15:01:35,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:01:35,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:01:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:01:35,296 INFO L87 Difference]: Start difference. First operand 1039 states and 2464 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:38,375 INFO L93 Difference]: Finished difference Result 2522 states and 6156 transitions. [2021-06-05 15:01:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:01:38,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:38,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:38,378 INFO L225 Difference]: With dead ends: 2522 [2021-06-05 15:01:38,378 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 15:01:38,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2187.8ms TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:01:38,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 15:01:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1041. [2021-06-05 15:01:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 2.373076923076923) internal successors, (2468), 1040 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 2468 transitions. [2021-06-05 15:01:38,392 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 2468 transitions. Word has length 30 [2021-06-05 15:01:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:38,392 INFO L482 AbstractCegarLoop]: Abstraction has 1041 states and 2468 transitions. [2021-06-05 15:01:38,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 2468 transitions. [2021-06-05 15:01:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:38,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:38,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:38,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 15:01:38,593 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:38,594 INFO L82 PathProgramCache]: Analyzing trace with hash 513543889, now seen corresponding path program 31 times [2021-06-05 15:01:38,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:38,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611418676] [2021-06-05 15:01:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:38,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:38,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611418676] [2021-06-05 15:01:38,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611418676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:38,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222816949] [2021-06-05 15:01:38,790 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:38,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:38,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:38,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:38,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:38,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:38,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:38,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222816949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:38,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:38,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:01:38,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962892039] [2021-06-05 15:01:38,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:38,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:38,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:38,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:38,973 INFO L87 Difference]: Start difference. First operand 1041 states and 2468 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:39,810 INFO L93 Difference]: Finished difference Result 2556 states and 6245 transitions. [2021-06-05 15:01:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:01:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:39,813 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 15:01:39,813 INFO L226 Difference]: Without dead ends: 2545 [2021-06-05 15:01:39,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 695.0ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:01:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-06-05 15:01:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1076. [2021-06-05 15:01:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 2.3813953488372093) internal successors, (2560), 1075 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 2560 transitions. [2021-06-05 15:01:39,827 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 2560 transitions. Word has length 30 [2021-06-05 15:01:39,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:39,827 INFO L482 AbstractCegarLoop]: Abstraction has 1076 states and 2560 transitions. [2021-06-05 15:01:39,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:39,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 2560 transitions. [2021-06-05 15:01:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:39,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:39,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:40,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 15:01:40,029 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:40,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:40,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2025022357, now seen corresponding path program 32 times [2021-06-05 15:01:40,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:40,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125470709] [2021-06-05 15:01:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:40,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:40,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125470709] [2021-06-05 15:01:40,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125470709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:40,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838181282] [2021-06-05 15:01:40,233 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:40,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:40,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:40,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:01:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:40,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:40,431 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 25 treesize of output 31 [2021-06-05 15:01:40,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:01:40,484 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-06-05 15:01:40,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:40,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-06-05 15:01:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:40,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838181282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:40,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:40,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:01:40,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293357852] [2021-06-05 15:01:40,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:01:40,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:01:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:01:40,574 INFO L87 Difference]: Start difference. First operand 1076 states and 2560 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:41,750 INFO L93 Difference]: Finished difference Result 2647 states and 6512 transitions. [2021-06-05 15:01:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:01:41,750 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:41,753 INFO L225 Difference]: With dead ends: 2647 [2021-06-05 15:01:41,753 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 15:01:41,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1024.5ms TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:01:41,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 15:01:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1107. [2021-06-05 15:01:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1106 states have (on average 2.387884267631103) internal successors, (2641), 1106 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 2641 transitions. [2021-06-05 15:01:41,767 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 2641 transitions. Word has length 30 [2021-06-05 15:01:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:41,767 INFO L482 AbstractCegarLoop]: Abstraction has 1107 states and 2641 transitions. [2021-06-05 15:01:41,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 2641 transitions. [2021-06-05 15:01:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:41,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:41,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:41,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 15:01:41,968 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:41,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1351994749, now seen corresponding path program 33 times [2021-06-05 15:01:41,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:41,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013358035] [2021-06-05 15:01:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:42,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:42,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013358035] [2021-06-05 15:01:42,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013358035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:42,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251239855] [2021-06-05 15:01:42,159 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:42,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:01:42,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:42,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:42,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:42,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:42,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:42,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:42,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:42,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251239855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:42,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:42,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:01:42,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837321815] [2021-06-05 15:01:42,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:42,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:42,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:42,346 INFO L87 Difference]: Start difference. First operand 1107 states and 2641 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:43,425 INFO L93 Difference]: Finished difference Result 2939 states and 7188 transitions. [2021-06-05 15:01:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:01:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:43,428 INFO L225 Difference]: With dead ends: 2939 [2021-06-05 15:01:43,428 INFO L226 Difference]: Without dead ends: 2917 [2021-06-05 15:01:43,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 932.7ms TimeCoverageRelationStatistics Valid=417, Invalid=1563, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:01:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-05 15:01:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1060. [2021-06-05 15:01:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 2.376770538243626) internal successors, (2517), 1059 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 2517 transitions. [2021-06-05 15:01:43,443 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 2517 transitions. Word has length 30 [2021-06-05 15:01:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:43,443 INFO L482 AbstractCegarLoop]: Abstraction has 1060 states and 2517 transitions. [2021-06-05 15:01:43,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 2517 transitions. [2021-06-05 15:01:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:43,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:43,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:43,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 15:01:43,644 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash 698605027, now seen corresponding path program 34 times [2021-06-05 15:01:43,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:43,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403165772] [2021-06-05 15:01:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:43,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:43,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403165772] [2021-06-05 15:01:43,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403165772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:43,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721806019] [2021-06-05 15:01:43,843 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:43,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:43,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:43,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:44,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:01:44,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:44,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:44,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:44,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:01:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:44,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721806019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:44,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:44,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:01:44,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042424110] [2021-06-05 15:01:44,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:44,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:44,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:44,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:44,033 INFO L87 Difference]: Start difference. First operand 1060 states and 2517 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:44,986 INFO L93 Difference]: Finished difference Result 2435 states and 5897 transitions. [2021-06-05 15:01:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:01:44,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:44,989 INFO L225 Difference]: With dead ends: 2435 [2021-06-05 15:01:44,989 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 15:01:44,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 771.6ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:01:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 15:01:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1045. [2021-06-05 15:01:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.3726053639846745) internal successors, (2477), 1044 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2477 transitions. [2021-06-05 15:01:45,003 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2477 transitions. Word has length 30 [2021-06-05 15:01:45,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:45,003 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2477 transitions. [2021-06-05 15:01:45,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2477 transitions. [2021-06-05 15:01:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:45,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:45,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:45,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:45,206 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:45,207 INFO L82 PathProgramCache]: Analyzing trace with hash -614639997, now seen corresponding path program 35 times [2021-06-05 15:01:45,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:45,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137897917] [2021-06-05 15:01:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:45,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137897917] [2021-06-05 15:01:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137897917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982452432] [2021-06-05 15:01:45,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:45,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:01:45,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:45,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:45,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:45,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:01:45,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:45,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:45,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:45,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:01:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:45,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982452432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:45,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:45,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:01:45,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763362781] [2021-06-05 15:01:45,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:45,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:45,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:45,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:45,658 INFO L87 Difference]: Start difference. First operand 1045 states and 2477 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:46,417 INFO L93 Difference]: Finished difference Result 2319 states and 5633 transitions. [2021-06-05 15:01:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:46,418 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:46,420 INFO L225 Difference]: With dead ends: 2319 [2021-06-05 15:01:46,420 INFO L226 Difference]: Without dead ends: 2309 [2021-06-05 15:01:46,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 683.3ms TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:01:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-06-05 15:01:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1042. [2021-06-05 15:01:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.372718539865514) internal successors, (2470), 1041 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2470 transitions. [2021-06-05 15:01:46,433 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2470 transitions. Word has length 30 [2021-06-05 15:01:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:46,433 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 2470 transitions. [2021-06-05 15:01:46,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2470 transitions. [2021-06-05 15:01:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:46,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:46,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:46,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:46,635 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:46,635 INFO L82 PathProgramCache]: Analyzing trace with hash 198282265, now seen corresponding path program 36 times [2021-06-05 15:01:46,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:46,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716938937] [2021-06-05 15:01:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:46,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716938937] [2021-06-05 15:01:46,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716938937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975253973] [2021-06-05 15:01:46,870 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:46,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:01:46,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:46,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:01:46,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:47,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:47,068 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 25 treesize of output 31 [2021-06-05 15:01:47,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:01:47,106 INFO L628 ElimStorePlain]: treesize reduction 8, result has 86.7 percent of original size [2021-06-05 15:01:47,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:47,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:52 [2021-06-05 15:01:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:47,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975253973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:47,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:47,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:01:47,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500783628] [2021-06-05 15:01:47,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:01:47,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:47,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:01:47,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:01:47,198 INFO L87 Difference]: Start difference. First operand 1042 states and 2470 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:48,583 INFO L93 Difference]: Finished difference Result 2426 states and 5913 transitions. [2021-06-05 15:01:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:01:48,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:48,586 INFO L225 Difference]: With dead ends: 2426 [2021-06-05 15:01:48,586 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 15:01:48,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1165.0ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:01:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 15:01:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1067. [2021-06-05 15:01:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 2.376172607879925) internal successors, (2533), 1066 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 2533 transitions. [2021-06-05 15:01:48,599 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 2533 transitions. Word has length 30 [2021-06-05 15:01:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:48,599 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 2533 transitions. [2021-06-05 15:01:48,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 2533 transitions. [2021-06-05 15:01:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:48,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:48,601 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:48,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 15:01:48,801 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1954683315, now seen corresponding path program 37 times [2021-06-05 15:01:48,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:48,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091524432] [2021-06-05 15:01:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:49,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:49,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091524432] [2021-06-05 15:01:49,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091524432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:49,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653951788] [2021-06-05 15:01:49,035 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:49,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:49,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:49,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:49,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:49,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:49,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:49,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:49,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653951788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:49,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:49,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:01:49,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989275146] [2021-06-05 15:01:49,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:49,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:49,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:49,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:49,207 INFO L87 Difference]: Start difference. First operand 1067 states and 2533 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:50,305 INFO L93 Difference]: Finished difference Result 2651 states and 6517 transitions. [2021-06-05 15:01:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:01:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:50,308 INFO L225 Difference]: With dead ends: 2651 [2021-06-05 15:01:50,308 INFO L226 Difference]: Without dead ends: 2631 [2021-06-05 15:01:50,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 933.0ms TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:01:50,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-06-05 15:01:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1067. [2021-06-05 15:01:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 2.376172607879925) internal successors, (2533), 1066 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 2533 transitions. [2021-06-05 15:01:50,320 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 2533 transitions. Word has length 30 [2021-06-05 15:01:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:50,320 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 2533 transitions. [2021-06-05 15:01:50,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 2533 transitions. [2021-06-05 15:01:50,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:50,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:50,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:50,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:50,522 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:50,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:50,522 INFO L82 PathProgramCache]: Analyzing trace with hash -811329913, now seen corresponding path program 38 times [2021-06-05 15:01:50,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:50,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869725312] [2021-06-05 15:01:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:50,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869725312] [2021-06-05 15:01:50,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869725312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174475233] [2021-06-05 15:01:50,771 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:50,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:50,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:50,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:01:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:50,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:50,993 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 28 treesize of output 32 [2021-06-05 15:01:50,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:51,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:51,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:51,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-06-05 15:01:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:51,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174475233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:51,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:51,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:01:51,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103542418] [2021-06-05 15:01:51,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:01:51,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:51,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:01:51,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:01:51,084 INFO L87 Difference]: Start difference. First operand 1067 states and 2533 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:52,784 INFO L93 Difference]: Finished difference Result 2587 states and 6285 transitions. [2021-06-05 15:01:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:01:52,785 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:52,787 INFO L225 Difference]: With dead ends: 2587 [2021-06-05 15:01:52,787 INFO L226 Difference]: Without dead ends: 2567 [2021-06-05 15:01:52,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1542.2ms TimeCoverageRelationStatistics Valid=573, Invalid=2079, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:01:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-06-05 15:01:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 1058. [2021-06-05 15:01:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 2.3746452223273415) internal successors, (2510), 1057 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2510 transitions. [2021-06-05 15:01:52,799 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2510 transitions. Word has length 30 [2021-06-05 15:01:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:52,799 INFO L482 AbstractCegarLoop]: Abstraction has 1058 states and 2510 transitions. [2021-06-05 15:01:52,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2510 transitions. [2021-06-05 15:01:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:52,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:52,800 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:53,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 15:01:53,001 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1128175109, now seen corresponding path program 39 times [2021-06-05 15:01:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:53,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221609924] [2021-06-05 15:01:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:53,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:53,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221609924] [2021-06-05 15:01:53,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221609924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:53,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363055814] [2021-06-05 15:01:53,246 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:53,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:01:53,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:53,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:01:53,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:53,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:53,401 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 20 treesize of output 36 [2021-06-05 15:01:53,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:53,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:53,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:53,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-06-05 15:01:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:53,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363055814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:53,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:53,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 15:01:53,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535197858] [2021-06-05 15:01:53,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:01:53,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:53,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:01:53,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:01:53,797 INFO L87 Difference]: Start difference. First operand 1058 states and 2510 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:54,335 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 15:01:55,169 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 15:01:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:56,071 INFO L93 Difference]: Finished difference Result 2375 states and 5793 transitions. [2021-06-05 15:01:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:01:56,071 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:56,074 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 15:01:56,074 INFO L226 Difference]: Without dead ends: 2364 [2021-06-05 15:01:56,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2190.8ms TimeCoverageRelationStatistics Valid=452, Invalid=2518, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:01:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-06-05 15:01:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1071. [2021-06-05 15:01:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 2.3757009345794393) internal successors, (2542), 1070 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 2542 transitions. [2021-06-05 15:01:56,086 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 2542 transitions. Word has length 30 [2021-06-05 15:01:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:56,086 INFO L482 AbstractCegarLoop]: Abstraction has 1071 states and 2542 transitions. [2021-06-05 15:01:56,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 2542 transitions. [2021-06-05 15:01:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:56,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:56,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:56,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 15:01:56,288 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash 628225941, now seen corresponding path program 40 times [2021-06-05 15:01:56,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:56,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755941387] [2021-06-05 15:01:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:56,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:56,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755941387] [2021-06-05 15:01:56,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755941387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:56,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123616580] [2021-06-05 15:01:56,536 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:56,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:56,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:56,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:56,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:56,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:56,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:56,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:56,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:56,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123616580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:56,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:56,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:01:56,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638170029] [2021-06-05 15:01:56,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:56,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:56,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:56,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:56,713 INFO L87 Difference]: Start difference. First operand 1071 states and 2542 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:58,237 INFO L93 Difference]: Finished difference Result 2674 states and 6561 transitions. [2021-06-05 15:01:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:01:58,237 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:01:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:58,240 INFO L225 Difference]: With dead ends: 2674 [2021-06-05 15:01:58,240 INFO L226 Difference]: Without dead ends: 2654 [2021-06-05 15:01:58,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1255.1ms TimeCoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:01:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-06-05 15:01:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 1062. [2021-06-05 15:01:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 2.3741753063147972) internal successors, (2519), 1061 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 2519 transitions. [2021-06-05 15:01:58,253 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 2519 transitions. Word has length 30 [2021-06-05 15:01:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:58,253 INFO L482 AbstractCegarLoop]: Abstraction has 1062 states and 2519 transitions. [2021-06-05 15:01:58,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 2519 transitions. [2021-06-05 15:01:58,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:01:58,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:58,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:58,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 15:01:58,455 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:58,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:58,455 INFO L82 PathProgramCache]: Analyzing trace with hash 27990785, now seen corresponding path program 41 times [2021-06-05 15:01:58,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:58,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262488819] [2021-06-05 15:01:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:58,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:58,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262488819] [2021-06-05 15:01:58,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262488819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:58,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411935707] [2021-06-05 15:01:58,674 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:58,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:01:58,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:58,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:01:58,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:58,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:01:58,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:58,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:58,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:58,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:01:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:58,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411935707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:58,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:58,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:01:58,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625388640] [2021-06-05 15:01:58,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:58,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:58,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:58,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:58,849 INFO L87 Difference]: Start difference. First operand 1062 states and 2519 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:00,515 INFO L93 Difference]: Finished difference Result 2797 states and 6881 transitions. [2021-06-05 15:02:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:02:00,516 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:00,518 INFO L225 Difference]: With dead ends: 2797 [2021-06-05 15:02:00,518 INFO L226 Difference]: Without dead ends: 2782 [2021-06-05 15:02:00,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1329.7ms TimeCoverageRelationStatistics Valid=415, Invalid=2135, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:02:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2021-06-05 15:02:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 1055. [2021-06-05 15:02:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.3747628083491463) internal successors, (2503), 1054 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2503 transitions. [2021-06-05 15:02:00,531 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2503 transitions. Word has length 30 [2021-06-05 15:02:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:00,531 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 2503 transitions. [2021-06-05 15:02:00,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2503 transitions. [2021-06-05 15:02:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:00,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:00,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:00,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 15:02:00,733 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 742201857, now seen corresponding path program 42 times [2021-06-05 15:02:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:00,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585212742] [2021-06-05 15:02:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:00,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:00,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585212742] [2021-06-05 15:02:00,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585212742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:00,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739290857] [2021-06-05 15:02:00,943 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:00,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:02:00,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:00,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:00,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:01,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:01,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:01,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:01,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:01,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:02:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:01,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739290857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:01,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:01,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 15:02:01,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813152484] [2021-06-05 15:02:01,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:02:01,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:02:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:01,136 INFO L87 Difference]: Start difference. First operand 1055 states and 2503 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:02,859 INFO L93 Difference]: Finished difference Result 2352 states and 5740 transitions. [2021-06-05 15:02:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:02:02,859 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:02,861 INFO L225 Difference]: With dead ends: 2352 [2021-06-05 15:02:02,861 INFO L226 Difference]: Without dead ends: 2343 [2021-06-05 15:02:02,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 925.2ms TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:02:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-06-05 15:02:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1054. [2021-06-05 15:02:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.375118708452042) internal successors, (2501), 1053 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 2501 transitions. [2021-06-05 15:02:02,873 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 2501 transitions. Word has length 30 [2021-06-05 15:02:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:02,873 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 2501 transitions. [2021-06-05 15:02:02,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 2501 transitions. [2021-06-05 15:02:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:02,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:02,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:03,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 15:02:03,077 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1134723779, now seen corresponding path program 25 times [2021-06-05 15:02:03,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:03,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635575767] [2021-06-05 15:02:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:03,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:03,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635575767] [2021-06-05 15:02:03,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635575767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:03,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882285144] [2021-06-05 15:02:03,320 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:03,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:03,504 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 15:02:03,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 15:02:03,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:03,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:03,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:03,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 15:02:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:03,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882285144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:03,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:03,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:02:03,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456387568] [2021-06-05 15:02:03,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:02:03,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:03,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:02:03,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:02:03,531 INFO L87 Difference]: Start difference. First operand 1054 states and 2501 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:05,232 INFO L93 Difference]: Finished difference Result 2280 states and 5531 transitions. [2021-06-05 15:02:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:02:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:05,234 INFO L225 Difference]: With dead ends: 2280 [2021-06-05 15:02:05,234 INFO L226 Difference]: Without dead ends: 2260 [2021-06-05 15:02:05,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1268.3ms TimeCoverageRelationStatistics Valid=444, Invalid=2208, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:02:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-06-05 15:02:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1049. [2021-06-05 15:02:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.3759541984732824) internal successors, (2490), 1048 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2490 transitions. [2021-06-05 15:02:05,246 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2490 transitions. Word has length 30 [2021-06-05 15:02:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:05,246 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 2490 transitions. [2021-06-05 15:02:05,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2490 transitions. [2021-06-05 15:02:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:05,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:05,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:05,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:05,447 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:05,448 INFO L82 PathProgramCache]: Analyzing trace with hash 84697641, now seen corresponding path program 26 times [2021-06-05 15:02:05,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:05,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524022409] [2021-06-05 15:02:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:05,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524022409] [2021-06-05 15:02:05,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524022409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388811939] [2021-06-05 15:02:05,697 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:05,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:05,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:02:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:05,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:05,901 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 [2021-06-05 15:02:05,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:05,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:05,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:05,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-06-05 15:02:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:05,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388811939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:05,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:05,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:02:05,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240801998] [2021-06-05 15:02:05,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:02:05,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:05,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:02:05,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:02:05,992 INFO L87 Difference]: Start difference. First operand 1049 states and 2490 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:08,275 INFO L93 Difference]: Finished difference Result 2513 states and 6135 transitions. [2021-06-05 15:02:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:02:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:08,278 INFO L225 Difference]: With dead ends: 2513 [2021-06-05 15:02:08,278 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 15:02:08,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1881.1ms TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:02:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 15:02:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1031. [2021-06-05 15:02:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.376699029126214) internal successors, (2448), 1030 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2448 transitions. [2021-06-05 15:02:08,290 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2448 transitions. Word has length 30 [2021-06-05 15:02:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:08,290 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 2448 transitions. [2021-06-05 15:02:08,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2448 transitions. [2021-06-05 15:02:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:08,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:08,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:08,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:08,492 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash -961089049, now seen corresponding path program 43 times [2021-06-05 15:02:08,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:08,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082555557] [2021-06-05 15:02:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:08,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:08,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082555557] [2021-06-05 15:02:08,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082555557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:08,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250870676] [2021-06-05 15:02:08,741 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:08,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:08,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:08,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:08,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:08,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:08,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:02:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:08,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250870676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:08,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:08,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 15:02:08,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72558836] [2021-06-05 15:02:08,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:02:08,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:08,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:02:08,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:08,945 INFO L87 Difference]: Start difference. First operand 1031 states and 2448 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:09,460 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 15:02:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:10,765 INFO L93 Difference]: Finished difference Result 2318 states and 5663 transitions. [2021-06-05 15:02:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:02:10,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:10,768 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 15:02:10,768 INFO L226 Difference]: Without dead ends: 2309 [2021-06-05 15:02:10,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1064.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:02:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-06-05 15:02:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1023. [2021-06-05 15:02:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.3767123287671232) internal successors, (2429), 1022 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2429 transitions. [2021-06-05 15:02:10,780 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2429 transitions. Word has length 30 [2021-06-05 15:02:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:10,780 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 2429 transitions. [2021-06-05 15:02:10,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2429 transitions. [2021-06-05 15:02:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:10,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:10,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:10,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 15:02:10,981 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:10,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1359235047, now seen corresponding path program 44 times [2021-06-05 15:02:10,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:10,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457744928] [2021-06-05 15:02:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:11,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:11,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457744928] [2021-06-05 15:02:11,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457744928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:11,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238686694] [2021-06-05 15:02:11,228 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:11,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:11,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:11,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:02:11,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:11,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:11,432 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 25 treesize of output 31 [2021-06-05 15:02:11,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:11,471 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-06-05 15:02:11,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:11,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-06-05 15:02:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:11,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238686694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:11,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:11,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:02:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459116648] [2021-06-05 15:02:11,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:02:11,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:02:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:02:11,564 INFO L87 Difference]: Start difference. First operand 1023 states and 2429 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:13,046 INFO L93 Difference]: Finished difference Result 2386 states and 5821 transitions. [2021-06-05 15:02:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:02:13,046 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:13,049 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 15:02:13,049 INFO L226 Difference]: Without dead ends: 2371 [2021-06-05 15:02:13,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1220.9ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:02:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-05 15:02:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1011. [2021-06-05 15:02:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.375247524752475) internal successors, (2399), 1010 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2399 transitions. [2021-06-05 15:02:13,062 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2399 transitions. Word has length 30 [2021-06-05 15:02:13,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:13,062 INFO L482 AbstractCegarLoop]: Abstraction has 1011 states and 2399 transitions. [2021-06-05 15:02:13,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:13,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2399 transitions. [2021-06-05 15:02:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:13,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:13,063 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:13,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 15:02:13,264 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:13,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1926120071, now seen corresponding path program 45 times [2021-06-05 15:02:13,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:13,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853562251] [2021-06-05 15:02:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:13,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:13,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853562251] [2021-06-05 15:02:13,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853562251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:13,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706042059] [2021-06-05 15:02:13,531 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:13,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:02:13,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:13,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:13,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:13,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:02:13,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:13,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:13,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:13,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:02:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:13,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706042059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:13,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:13,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:02:13,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393407044] [2021-06-05 15:02:13,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:02:13,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:02:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:02:13,723 INFO L87 Difference]: Start difference. First operand 1011 states and 2399 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:14,732 INFO L93 Difference]: Finished difference Result 2268 states and 5516 transitions. [2021-06-05 15:02:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:02:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:14,735 INFO L225 Difference]: With dead ends: 2268 [2021-06-05 15:02:14,735 INFO L226 Difference]: Without dead ends: 2245 [2021-06-05 15:02:14,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 901.7ms TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-06-05 15:02:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 996. [2021-06-05 15:02:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 2.3738693467336685) internal successors, (2362), 995 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 2362 transitions. [2021-06-05 15:02:14,747 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 2362 transitions. Word has length 30 [2021-06-05 15:02:14,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:14,747 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 2362 transitions. [2021-06-05 15:02:14,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 2362 transitions. [2021-06-05 15:02:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:14,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:14,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:14,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:14,948 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:14,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash 389195863, now seen corresponding path program 46 times [2021-06-05 15:02:14,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:14,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386217616] [2021-06-05 15:02:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:15,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:15,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386217616] [2021-06-05 15:02:15,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386217616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:15,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182745395] [2021-06-05 15:02:15,183 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:15,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:15,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:15,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:15,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:15,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:15,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:15,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:15,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:15,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:02:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:15,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182745395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:15,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:15,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 15:02:15,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330152699] [2021-06-05 15:02:15,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:02:15,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:15,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:02:15,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:15,376 INFO L87 Difference]: Start difference. First operand 996 states and 2362 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:16,748 INFO L93 Difference]: Finished difference Result 2400 states and 5871 transitions. [2021-06-05 15:02:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:02:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:16,751 INFO L225 Difference]: With dead ends: 2400 [2021-06-05 15:02:16,751 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 15:02:16,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 948.7ms TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:02:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 15:02:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1018. [2021-06-05 15:02:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 2.3785644051130777) internal successors, (2419), 1017 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 2419 transitions. [2021-06-05 15:02:16,764 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 2419 transitions. Word has length 30 [2021-06-05 15:02:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:16,764 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 2419 transitions. [2021-06-05 15:02:16,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 2419 transitions. [2021-06-05 15:02:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:16,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:16,765 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:16,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:16,966 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1164967287, now seen corresponding path program 47 times [2021-06-05 15:02:16,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:16,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52212565] [2021-06-05 15:02:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:17,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52212565] [2021-06-05 15:02:17,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52212565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:17,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889203430] [2021-06-05 15:02:17,193 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:17,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:02:17,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:17,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:02:17,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:17,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:02:17,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:02:17,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:17,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:17,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:02:17,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:17,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:17,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:17,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:11 [2021-06-05 15:02:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889203430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:17,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:17,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:02:17,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984974155] [2021-06-05 15:02:17,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:02:17,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:17,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:02:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:02:17,544 INFO L87 Difference]: Start difference. First operand 1018 states and 2419 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:18,950 INFO L93 Difference]: Finished difference Result 2256 states and 5534 transitions. [2021-06-05 15:02:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:02:18,950 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:18,953 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 15:02:18,953 INFO L226 Difference]: Without dead ends: 2247 [2021-06-05 15:02:18,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1319.2ms TimeCoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:02:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-06-05 15:02:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1047. [2021-06-05 15:02:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 2.387189292543021) internal successors, (2497), 1046 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 2497 transitions. [2021-06-05 15:02:18,966 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 2497 transitions. Word has length 30 [2021-06-05 15:02:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:18,966 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 2497 transitions. [2021-06-05 15:02:18,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 2497 transitions. [2021-06-05 15:02:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:18,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:18,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:19,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:19,168 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:19,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:19,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1830170455, now seen corresponding path program 48 times [2021-06-05 15:02:19,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:19,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105977105] [2021-06-05 15:02:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:19,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:19,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105977105] [2021-06-05 15:02:19,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105977105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:19,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574083672] [2021-06-05 15:02:19,379 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:19,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:02:19,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:19,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:19,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:19,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:19,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:19,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:19,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:19,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:02:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:19,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574083672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:19,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:19,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:02:19,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352446963] [2021-06-05 15:02:19,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:02:19,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:19,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:02:19,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:02:19,583 INFO L87 Difference]: Start difference. First operand 1047 states and 2497 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:21,009 INFO L93 Difference]: Finished difference Result 2608 states and 6424 transitions. [2021-06-05 15:02:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:02:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:21,012 INFO L225 Difference]: With dead ends: 2608 [2021-06-05 15:02:21,012 INFO L226 Difference]: Without dead ends: 2591 [2021-06-05 15:02:21,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1149.1ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:02:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-06-05 15:02:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1087. [2021-06-05 15:02:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.39134438305709) internal successors, (2597), 1086 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2597 transitions. [2021-06-05 15:02:21,025 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2597 transitions. Word has length 30 [2021-06-05 15:02:21,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:21,025 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 2597 transitions. [2021-06-05 15:02:21,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2597 transitions. [2021-06-05 15:02:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:21,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:21,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:21,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 15:02:21,227 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:21,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1466543531, now seen corresponding path program 49 times [2021-06-05 15:02:21,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:21,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960667597] [2021-06-05 15:02:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:21,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:21,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960667597] [2021-06-05 15:02:21,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960667597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:21,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812075675] [2021-06-05 15:02:21,434 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:21,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:21,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:21,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:21,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:21,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:21,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:02:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:21,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812075675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:21,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:21,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 15:02:21,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922769645] [2021-06-05 15:02:21,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:02:21,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:21,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:02:21,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:21,638 INFO L87 Difference]: Start difference. First operand 1087 states and 2597 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:23,143 INFO L93 Difference]: Finished difference Result 2444 states and 5988 transitions. [2021-06-05 15:02:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:02:23,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:23,145 INFO L225 Difference]: With dead ends: 2444 [2021-06-05 15:02:23,145 INFO L226 Difference]: Without dead ends: 2435 [2021-06-05 15:02:23,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1026.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:02:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-05 15:02:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1086. [2021-06-05 15:02:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.390783410138249) internal successors, (2594), 1085 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2594 transitions. [2021-06-05 15:02:23,158 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2594 transitions. Word has length 30 [2021-06-05 15:02:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:23,158 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 2594 transitions. [2021-06-05 15:02:23,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2594 transitions. [2021-06-05 15:02:23,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:23,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:23,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:23,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 15:02:23,359 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1628918971, now seen corresponding path program 50 times [2021-06-05 15:02:23,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:23,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119016506] [2021-06-05 15:02:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:23,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:23,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119016506] [2021-06-05 15:02:23,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119016506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:23,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604048143] [2021-06-05 15:02:23,573 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:23,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:23,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:23,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:23,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:23,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:23,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:23,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:23,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:23,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:02:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:23,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604048143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:23,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:23,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:02:23,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511330987] [2021-06-05 15:02:23,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:02:23,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:02:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:02:23,756 INFO L87 Difference]: Start difference. First operand 1086 states and 2594 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:25,772 INFO L93 Difference]: Finished difference Result 2770 states and 6829 transitions. [2021-06-05 15:02:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:02:25,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:25,775 INFO L225 Difference]: With dead ends: 2770 [2021-06-05 15:02:25,775 INFO L226 Difference]: Without dead ends: 2755 [2021-06-05 15:02:25,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1663.4ms TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:02:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-06-05 15:02:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1065. [2021-06-05 15:02:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 2.3843984962406015) internal successors, (2537), 1064 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2537 transitions. [2021-06-05 15:02:25,790 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2537 transitions. Word has length 30 [2021-06-05 15:02:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:25,790 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 2537 transitions. [2021-06-05 15:02:25,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2537 transitions. [2021-06-05 15:02:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:25,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:25,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:25,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 15:02:25,992 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:25,992 INFO L82 PathProgramCache]: Analyzing trace with hash 331204883, now seen corresponding path program 51 times [2021-06-05 15:02:25,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:25,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787849283] [2021-06-05 15:02:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:26,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:26,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787849283] [2021-06-05 15:02:26,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787849283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:26,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736595234] [2021-06-05 15:02:26,248 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:26,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:02:26,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:26,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:02:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:26,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:26,453 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 25 treesize of output 31 [2021-06-05 15:02:26,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:26,503 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.7 percent of original size [2021-06-05 15:02:26,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:26,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:63 [2021-06-05 15:02:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:26,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736595234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:26,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:26,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-06-05 15:02:26,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880754903] [2021-06-05 15:02:26,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:02:26,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:02:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:02:26,669 INFO L87 Difference]: Start difference. First operand 1065 states and 2537 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:28,565 INFO L93 Difference]: Finished difference Result 2523 states and 6173 transitions. [2021-06-05 15:02:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:02:28,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:28,568 INFO L225 Difference]: With dead ends: 2523 [2021-06-05 15:02:28,568 INFO L226 Difference]: Without dead ends: 2512 [2021-06-05 15:02:28,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1464.0ms TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:02:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-05 15:02:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1119. [2021-06-05 15:02:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.3989266547406083) internal successors, (2682), 1118 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2682 transitions. [2021-06-05 15:02:28,582 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2682 transitions. Word has length 30 [2021-06-05 15:02:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:28,582 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 2682 transitions. [2021-06-05 15:02:28,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2682 transitions. [2021-06-05 15:02:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:28,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:28,584 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:28,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:28,784 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2087605933, now seen corresponding path program 52 times [2021-06-05 15:02:28,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:28,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43438761] [2021-06-05 15:02:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:29,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:29,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43438761] [2021-06-05 15:02:29,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43438761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:29,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513580811] [2021-06-05 15:02:29,070 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:29,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:29,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:29,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:29,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:29,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:29,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:29,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:02:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:29,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513580811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:29,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:29,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:02:29,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593793353] [2021-06-05 15:02:29,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:02:29,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:29,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:02:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:29,260 INFO L87 Difference]: Start difference. First operand 1119 states and 2682 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:30,490 INFO L93 Difference]: Finished difference Result 2681 states and 6617 transitions. [2021-06-05 15:02:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:02:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:30,493 INFO L225 Difference]: With dead ends: 2681 [2021-06-05 15:02:30,493 INFO L226 Difference]: Without dead ends: 2661 [2021-06-05 15:02:30,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 981.1ms TimeCoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:02:30,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2021-06-05 15:02:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1134. [2021-06-05 15:02:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 2.4007060900264783) internal successors, (2720), 1133 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2720 transitions. [2021-06-05 15:02:30,508 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2720 transitions. Word has length 30 [2021-06-05 15:02:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:30,508 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 2720 transitions. [2021-06-05 15:02:30,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2720 transitions. [2021-06-05 15:02:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:30,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:30,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:30,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:30,709 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:30,709 INFO L82 PathProgramCache]: Analyzing trace with hash -678407295, now seen corresponding path program 53 times [2021-06-05 15:02:30,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:30,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79159697] [2021-06-05 15:02:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:30,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:30,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79159697] [2021-06-05 15:02:30,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79159697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:30,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402136858] [2021-06-05 15:02:30,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:30,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:02:30,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:30,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:30,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:31,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:02:31,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:31,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:31,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:31,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:02:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:31,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402136858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:31,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:31,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:02:31,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341423662] [2021-06-05 15:02:31,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:02:31,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:31,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:02:31,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:02:31,136 INFO L87 Difference]: Start difference. First operand 1134 states and 2720 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:32,188 INFO L93 Difference]: Finished difference Result 2386 states and 5835 transitions. [2021-06-05 15:02:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:02:32,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:32,191 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 15:02:32,191 INFO L226 Difference]: Without dead ends: 2363 [2021-06-05 15:02:32,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 824.4ms TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:02:32,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-06-05 15:02:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1125. [2021-06-05 15:02:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.3976868327402134) internal successors, (2695), 1124 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2695 transitions. [2021-06-05 15:02:32,203 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2695 transitions. Word has length 30 [2021-06-05 15:02:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:32,203 INFO L482 AbstractCegarLoop]: Abstraction has 1125 states and 2695 transitions. [2021-06-05 15:02:32,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2695 transitions. [2021-06-05 15:02:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:32,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:32,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:32,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:32,408 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:32,408 INFO L82 PathProgramCache]: Analyzing trace with hash 395838389, now seen corresponding path program 54 times [2021-06-05 15:02:32,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:32,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036002711] [2021-06-05 15:02:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:32,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:32,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036002711] [2021-06-05 15:02:32,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036002711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:32,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262355838] [2021-06-05 15:02:32,666 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:32,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:02:32,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:32,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:32,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:32,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:32,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:32,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:32,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:02:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:32,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262355838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:32,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:32,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:02:32,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711085594] [2021-06-05 15:02:32,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:02:32,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:32,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:02:32,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:32,832 INFO L87 Difference]: Start difference. First operand 1125 states and 2695 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:33,893 INFO L93 Difference]: Finished difference Result 2541 states and 6233 transitions. [2021-06-05 15:02:33,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:02:33,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:33,896 INFO L225 Difference]: With dead ends: 2541 [2021-06-05 15:02:33,896 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 15:02:33,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 869.3ms TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 15:02:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1134. [2021-06-05 15:02:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 2.3971756398940864) internal successors, (2716), 1133 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2716 transitions. [2021-06-05 15:02:33,909 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2716 transitions. Word has length 30 [2021-06-05 15:02:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:33,909 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 2716 transitions. [2021-06-05 15:02:33,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2716 transitions. [2021-06-05 15:02:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:33,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:33,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:34,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 15:02:34,110 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:34,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2142727857, now seen corresponding path program 55 times [2021-06-05 15:02:34,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:34,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215297112] [2021-06-05 15:02:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:34,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:34,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215297112] [2021-06-05 15:02:34,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215297112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:34,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792303590] [2021-06-05 15:02:34,371 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:34,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:34,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:34,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:34,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:34,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:34,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:34,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:02:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:34,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792303590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:34,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:34,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:02:34,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018038236] [2021-06-05 15:02:34,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:02:34,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:34,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:02:34,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:34,553 INFO L87 Difference]: Start difference. First operand 1134 states and 2716 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:35,673 INFO L93 Difference]: Finished difference Result 2677 states and 6594 transitions. [2021-06-05 15:02:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:02:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:35,676 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 15:02:35,676 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 15:02:35,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 948.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:02:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 15:02:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 1127. [2021-06-05 15:02:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.3978685612788633) internal successors, (2700), 1126 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 2700 transitions. [2021-06-05 15:02:35,690 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 2700 transitions. Word has length 30 [2021-06-05 15:02:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:35,691 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 2700 transitions. [2021-06-05 15:02:35,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 2700 transitions. [2021-06-05 15:02:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:35,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:35,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:35,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 15:02:35,892 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:35,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:35,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2028751941, now seen corresponding path program 56 times [2021-06-05 15:02:35,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:35,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116305549] [2021-06-05 15:02:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:36,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:36,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116305549] [2021-06-05 15:02:36,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116305549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:36,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88253368] [2021-06-05 15:02:36,124 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:36,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:36,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:36,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:36,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:02:36,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:36,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:36,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:36,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:02:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:36,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88253368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:36,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:36,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 15:02:36,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632950331] [2021-06-05 15:02:36,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:02:36,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:36,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:02:36,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:36,316 INFO L87 Difference]: Start difference. First operand 1127 states and 2700 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:37,856 INFO L93 Difference]: Finished difference Result 2483 states and 6087 transitions. [2021-06-05 15:02:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:02:37,856 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:37,859 INFO L225 Difference]: With dead ends: 2483 [2021-06-05 15:02:37,859 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 15:02:37,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 930.1ms TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:02:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 15:02:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1119. [2021-06-05 15:02:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.3980322003577816) internal successors, (2681), 1118 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2681 transitions. [2021-06-05 15:02:37,872 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2681 transitions. Word has length 30 [2021-06-05 15:02:37,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:37,872 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 2681 transitions. [2021-06-05 15:02:37,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2681 transitions. [2021-06-05 15:02:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:37,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:37,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:38,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 15:02:38,073 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash -630057595, now seen corresponding path program 27 times [2021-06-05 15:02:38,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:38,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288569724] [2021-06-05 15:02:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:38,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:38,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288569724] [2021-06-05 15:02:38,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288569724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:38,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013540110] [2021-06-05 15:02:38,300 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:38,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:02:38,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:38,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:02:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:38,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:38,567 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 19 treesize of output 35 [2021-06-05 15:02:38,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:38,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:38,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:38,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:177 [2021-06-05 15:02:38,749 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 15:02:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:38,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013540110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:38,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:38,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 15:02:38,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718728732] [2021-06-05 15:02:38,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:02:38,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:38,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:02:38,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:02:38,900 INFO L87 Difference]: Start difference. First operand 1119 states and 2681 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:41,650 INFO L93 Difference]: Finished difference Result 2536 states and 6209 transitions. [2021-06-05 15:02:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:02:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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 30 [2021-06-05 15:02:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:41,653 INFO L225 Difference]: With dead ends: 2536 [2021-06-05 15:02:41,653 INFO L226 Difference]: Without dead ends: 2521 [2021-06-05 15:02:41,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2034.5ms TimeCoverageRelationStatistics Valid=390, Invalid=3032, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:02:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-05 15:02:41,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1142. [2021-06-05 15:02:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 2.4031551270815075) internal successors, (2742), 1141 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 2742 transitions. [2021-06-05 15:02:41,666 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 2742 transitions. Word has length 30 [2021-06-05 15:02:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:41,666 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 2742 transitions. [2021-06-05 15:02:41,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 2742 transitions. [2021-06-05 15:02:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:41,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:41,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:41,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 15:02:41,867 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:41,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1250544731, now seen corresponding path program 28 times [2021-06-05 15:02:41,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:41,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315240829] [2021-06-05 15:02:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:42,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315240829] [2021-06-05 15:02:42,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315240829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860239789] [2021-06-05 15:02:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:42,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:42,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:42,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:42,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:42,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:02:42,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:02:42,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:42,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:42,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:42,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:02:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860239789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:42,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:02:42,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219029468] [2021-06-05 15:02:42,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:02:42,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:42,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:02:42,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:02:42,292 INFO L87 Difference]: Start difference. First operand 1142 states and 2742 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:43,475 INFO L93 Difference]: Finished difference Result 2574 states and 6337 transitions. [2021-06-05 15:02:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:02:43,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:43,478 INFO L225 Difference]: With dead ends: 2574 [2021-06-05 15:02:43,478 INFO L226 Difference]: Without dead ends: 2563 [2021-06-05 15:02:43,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 969.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:02:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-05 15:02:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1173. [2021-06-05 15:02:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.406996587030717) internal successors, (2821), 1172 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 2821 transitions. [2021-06-05 15:02:43,493 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 2821 transitions. Word has length 30 [2021-06-05 15:02:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:43,493 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 2821 transitions. [2021-06-05 15:02:43,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 2821 transitions. [2021-06-05 15:02:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:43,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:43,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:43,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:43,694 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:43,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:43,695 INFO L82 PathProgramCache]: Analyzing trace with hash -585341563, now seen corresponding path program 29 times [2021-06-05 15:02:43,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:43,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724450330] [2021-06-05 15:02:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:43,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:43,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724450330] [2021-06-05 15:02:43,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724450330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:43,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689346342] [2021-06-05 15:02:43,926 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:43,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:02:43,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:43,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:43,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:44,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:02:44,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:02:44,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:44,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:44,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:44,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:02:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:44,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689346342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:44,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:44,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:02:44,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583619260] [2021-06-05 15:02:44,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:02:44,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:44,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:02:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:02:44,138 INFO L87 Difference]: Start difference. First operand 1173 states and 2821 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:45,373 INFO L93 Difference]: Finished difference Result 2645 states and 6520 transitions. [2021-06-05 15:02:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:02:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:45,375 INFO L225 Difference]: With dead ends: 2645 [2021-06-05 15:02:45,375 INFO L226 Difference]: Without dead ends: 2625 [2021-06-05 15:02:45,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:02:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-06-05 15:02:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1161. [2021-06-05 15:02:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.4051724137931036) internal successors, (2790), 1160 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2790 transitions. [2021-06-05 15:02:45,390 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2790 transitions. Word has length 30 [2021-06-05 15:02:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:45,390 INFO L482 AbstractCegarLoop]: Abstraction has 1161 states and 2790 transitions. [2021-06-05 15:02:45,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2790 transitions. [2021-06-05 15:02:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:45,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:45,391 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:45,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:45,591 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -163012025, now seen corresponding path program 30 times [2021-06-05 15:02:45,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:45,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881446673] [2021-06-05 15:02:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:45,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:45,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881446673] [2021-06-05 15:02:45,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881446673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:45,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485603163] [2021-06-05 15:02:45,834 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:45,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:02:45,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:45,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:02:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:46,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:02:46,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:46,050 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 25 treesize of output 33 [2021-06-05 15:02:46,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:46,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:46,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:46,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:57 [2021-06-05 15:02:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:46,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485603163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:46,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:46,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 15:02:46,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734707864] [2021-06-05 15:02:46,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:02:46,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:02:46,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:02:46,195 INFO L87 Difference]: Start difference. First operand 1161 states and 2790 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-06-05 15:02:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:47,853 INFO L93 Difference]: Finished difference Result 2509 states and 6168 transitions. [2021-06-05 15:02:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:02:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:47,856 INFO L225 Difference]: With dead ends: 2509 [2021-06-05 15:02:47,856 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 15:02:47,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1273.0ms TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:02:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 15:02:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1176. [2021-06-05 15:02:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.4051063829787234) internal successors, (2826), 1175 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2826 transitions. [2021-06-05 15:02:47,869 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2826 transitions. Word has length 30 [2021-06-05 15:02:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:47,869 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 2826 transitions. [2021-06-05 15:02:47,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-06-05 15:02:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2826 transitions. [2021-06-05 15:02:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:47,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:47,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:48,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 15:02:48,070 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:48,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1593389025, now seen corresponding path program 31 times [2021-06-05 15:02:48,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:48,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012841074] [2021-06-05 15:02:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:48,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:48,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012841074] [2021-06-05 15:02:48,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012841074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853464095] [2021-06-05 15:02:48,305 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:48,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:48,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:02:48,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:02:48,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:48,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:48,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:48,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:02:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:48,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853464095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:48,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:02:48,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878406041] [2021-06-05 15:02:48,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:48,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:48,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:48,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:48,511 INFO L87 Difference]: Start difference. First operand 1176 states and 2826 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:49,769 INFO L93 Difference]: Finished difference Result 2729 states and 6734 transitions. [2021-06-05 15:02:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:02:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:49,772 INFO L225 Difference]: With dead ends: 2729 [2021-06-05 15:02:49,772 INFO L226 Difference]: Without dead ends: 2709 [2021-06-05 15:02:49,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1033.2ms TimeCoverageRelationStatistics Valid=345, Invalid=1725, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:02:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2021-06-05 15:02:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 1173. [2021-06-05 15:02:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.4044368600682593) internal successors, (2818), 1172 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 2818 transitions. [2021-06-05 15:02:49,787 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 2818 transitions. Word has length 30 [2021-06-05 15:02:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:49,787 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 2818 transitions. [2021-06-05 15:02:49,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 2818 transitions. [2021-06-05 15:02:49,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:49,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:49,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:49,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:49,988 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2128833233, now seen corresponding path program 32 times [2021-06-05 15:02:49,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:49,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844544380] [2021-06-05 15:02:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:50,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844544380] [2021-06-05 15:02:50,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844544380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294619255] [2021-06-05 15:02:50,229 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:50,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:50,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:50,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:50,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:02:50,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:50,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:50,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:50,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:02:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294619255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:50,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:02:50,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923680353] [2021-06-05 15:02:50,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:02:50,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:50,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:02:50,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:02:50,470 INFO L87 Difference]: Start difference. First operand 1173 states and 2818 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:51,945 INFO L93 Difference]: Finished difference Result 2430 states and 5932 transitions. [2021-06-05 15:02:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:02:51,945 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:51,948 INFO L225 Difference]: With dead ends: 2430 [2021-06-05 15:02:51,948 INFO L226 Difference]: Without dead ends: 2410 [2021-06-05 15:02:51,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1051.0ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:02:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-05 15:02:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1168. [2021-06-05 15:02:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.4044558697514997) internal successors, (2806), 1167 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2806 transitions. [2021-06-05 15:02:51,961 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2806 transitions. Word has length 30 [2021-06-05 15:02:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:51,961 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2806 transitions. [2021-06-05 15:02:51,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2806 transitions. [2021-06-05 15:02:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:51,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:51,962 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:52,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 15:02:52,162 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:52,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:52,163 INFO L82 PathProgramCache]: Analyzing trace with hash -946712643, now seen corresponding path program 33 times [2021-06-05 15:02:52,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:52,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470268919] [2021-06-05 15:02:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:52,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:52,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470268919] [2021-06-05 15:02:52,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470268919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978992340] [2021-06-05 15:02:52,389 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:52,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:02:52,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:52,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:02:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:52,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:52,715 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 25 treesize of output 41 [2021-06-05 15:02:52,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:52,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:52,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:52,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:123 [2021-06-05 15:02:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:52,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978992340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:52,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 15:02:52,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799762731] [2021-06-05 15:02:52,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:02:52,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:52,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:02:52,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:02:52,954 INFO L87 Difference]: Start difference. First operand 1168 states and 2806 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:02:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:55,355 INFO L93 Difference]: Finished difference Result 2642 states and 6461 transitions. [2021-06-05 15:02:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:02:55,355 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:55,358 INFO L225 Difference]: With dead ends: 2642 [2021-06-05 15:02:55,358 INFO L226 Difference]: Without dead ends: 2631 [2021-06-05 15:02:55,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1779.9ms TimeCoverageRelationStatistics Valid=494, Invalid=2812, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:02:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-06-05 15:02:55,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1199. [2021-06-05 15:02:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.4098497495826376) internal successors, (2887), 1198 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 2887 transitions. [2021-06-05 15:02:55,372 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 2887 transitions. Word has length 30 [2021-06-05 15:02:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:55,372 INFO L482 AbstractCegarLoop]: Abstraction has 1199 states and 2887 transitions. [2021-06-05 15:02:55,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:02:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 2887 transitions. [2021-06-05 15:02:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:55,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:55,373 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:55,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 15:02:55,574 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash 809688407, now seen corresponding path program 34 times [2021-06-05 15:02:55,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:55,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763653029] [2021-06-05 15:02:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:55,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763653029] [2021-06-05 15:02:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763653029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854764531] [2021-06-05 15:02:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:55,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:55,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:55,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:02:55,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:55,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:55,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:55,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:02:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:56,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854764531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:56,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:56,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:02:56,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765929946] [2021-06-05 15:02:56,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:56,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:56,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:56,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:56,025 INFO L87 Difference]: Start difference. First operand 1199 states and 2887 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:57,685 INFO L93 Difference]: Finished difference Result 2948 states and 7300 transitions. [2021-06-05 15:02:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:02:57,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:57,688 INFO L225 Difference]: With dead ends: 2948 [2021-06-05 15:02:57,688 INFO L226 Difference]: Without dead ends: 2928 [2021-06-05 15:02:57,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1278.4ms TimeCoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:02:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-06-05 15:02:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1241. [2021-06-05 15:02:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.4161290322580644) internal successors, (2996), 1240 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2996 transitions. [2021-06-05 15:02:57,703 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2996 transitions. Word has length 30 [2021-06-05 15:02:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:57,703 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 2996 transitions. [2021-06-05 15:02:57,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2996 transitions. [2021-06-05 15:02:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:57,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:57,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:57,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 15:02:57,904 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1345132615, now seen corresponding path program 35 times [2021-06-05 15:02:57,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:57,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801133] [2021-06-05 15:02:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:58,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:58,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801133] [2021-06-05 15:02:58,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:58,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676744579] [2021-06-05 15:02:58,124 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:58,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:02:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:58,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:58,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:02:58,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:58,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:58,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:58,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:02:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:58,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676744579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:58,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:58,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:02:58,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734273069] [2021-06-05 15:02:58,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:02:58,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:58,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:02:58,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:02:58,332 INFO L87 Difference]: Start difference. First operand 1241 states and 2996 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:59,785 INFO L93 Difference]: Finished difference Result 2473 states and 6062 transitions. [2021-06-05 15:02:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:02:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:02:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:59,788 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 15:02:59,788 INFO L226 Difference]: Without dead ends: 2453 [2021-06-05 15:02:59,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 920.7ms TimeCoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:02:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-05 15:02:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1235. [2021-06-05 15:02:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 2.4157212317666126) internal successors, (2981), 1234 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 2981 transitions. [2021-06-05 15:02:59,801 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 2981 transitions. Word has length 30 [2021-06-05 15:02:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:59,802 INFO L482 AbstractCegarLoop]: Abstraction has 1235 states and 2981 transitions. [2021-06-05 15:02:59,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 2981 transitions. [2021-06-05 15:02:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:02:59,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:59,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:00,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 15:03:00,003 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1749878753, now seen corresponding path program 36 times [2021-06-05 15:03:00,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:00,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993449750] [2021-06-05 15:03:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:00,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:00,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993449750] [2021-06-05 15:03:00,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993449750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072232895] [2021-06-05 15:03:00,220 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:00,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:03:00,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:00,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:03:00,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:00,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:03:00,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:00,470 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 20 treesize of output 28 [2021-06-05 15:03:00,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:00,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:00,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:00,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:38 [2021-06-05 15:03:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:00,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072232895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:00,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 15:03:00,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202878314] [2021-06-05 15:03:00,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:03:00,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:00,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:03:00,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:03:00,608 INFO L87 Difference]: Start difference. First operand 1235 states and 2981 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 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) [2021-06-05 15:03:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:02,730 INFO L93 Difference]: Finished difference Result 2716 states and 6646 transitions. [2021-06-05 15:03:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:03:02,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:02,733 INFO L225 Difference]: With dead ends: 2716 [2021-06-05 15:03:02,733 INFO L226 Difference]: Without dead ends: 2685 [2021-06-05 15:03:02,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1476.5ms TimeCoverageRelationStatistics Valid=380, Invalid=1972, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:03:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-06-05 15:03:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1228. [2021-06-05 15:03:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.4140179299103504) internal successors, (2962), 1227 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 2962 transitions. [2021-06-05 15:03:02,746 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 2962 transitions. Word has length 30 [2021-06-05 15:03:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:02,747 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 2962 transitions. [2021-06-05 15:03:02,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 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) [2021-06-05 15:03:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 2962 transitions. [2021-06-05 15:03:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:02,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:02,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:02,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:02,948 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1662047545, now seen corresponding path program 37 times [2021-06-05 15:03:02,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:02,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053252098] [2021-06-05 15:03:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:03,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:03,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053252098] [2021-06-05 15:03:03,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053252098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:03,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90294485] [2021-06-05 15:03:03,136 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:03,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:03,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:03:03,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:03,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:03,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:03,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:03:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:03,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90294485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:03,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:03,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:03:03,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130087617] [2021-06-05 15:03:03,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:03,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:03,355 INFO L87 Difference]: Start difference. First operand 1228 states and 2962 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:04,675 INFO L93 Difference]: Finished difference Result 2963 states and 7309 transitions. [2021-06-05 15:03:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:03:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:04,678 INFO L225 Difference]: With dead ends: 2963 [2021-06-05 15:03:04,678 INFO L226 Difference]: Without dead ends: 2947 [2021-06-05 15:03:04,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 976.3ms TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:03:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-06-05 15:03:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1249. [2021-06-05 15:03:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 2.417467948717949) internal successors, (3017), 1248 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3017 transitions. [2021-06-05 15:03:04,695 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3017 transitions. Word has length 30 [2021-06-05 15:03:04,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:04,695 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 3017 transitions. [2021-06-05 15:03:04,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3017 transitions. [2021-06-05 15:03:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:04,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:04,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:04,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:04,896 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 94353505, now seen corresponding path program 38 times [2021-06-05 15:03:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:04,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447701329] [2021-06-05 15:03:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:05,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:05,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447701329] [2021-06-05 15:03:05,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447701329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414923476] [2021-06-05 15:03:05,096 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:05,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:05,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:05,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:03:05,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:05,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:03:05,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:05,338 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 27 treesize of output 35 [2021-06-05 15:03:05,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:05,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:05,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:05,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:40 [2021-06-05 15:03:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:05,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414923476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:05,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 15:03:05,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575542798] [2021-06-05 15:03:05,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:03:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:03:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:03:05,447 INFO L87 Difference]: Start difference. First operand 1249 states and 3017 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:03:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:06,865 INFO L93 Difference]: Finished difference Result 2873 states and 7111 transitions. [2021-06-05 15:03:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:03:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:06,868 INFO L225 Difference]: With dead ends: 2873 [2021-06-05 15:03:06,868 INFO L226 Difference]: Without dead ends: 2861 [2021-06-05 15:03:06,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1100.2ms TimeCoverageRelationStatistics Valid=400, Invalid=1856, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:03:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-05 15:03:06,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 1256. [2021-06-05 15:03:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 2.417529880478088) internal successors, (3034), 1255 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 3034 transitions. [2021-06-05 15:03:06,882 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 3034 transitions. Word has length 30 [2021-06-05 15:03:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:06,883 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 3034 transitions. [2021-06-05 15:03:06,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:03:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 3034 transitions. [2021-06-05 15:03:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:06,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:06,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:07,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:07,084 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:07,085 INFO L82 PathProgramCache]: Analyzing trace with hash -823596685, now seen corresponding path program 39 times [2021-06-05 15:03:07,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:07,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550809500] [2021-06-05 15:03:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:07,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550809500] [2021-06-05 15:03:07,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550809500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465961336] [2021-06-05 15:03:07,295 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:07,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:07,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:07,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:07,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:03:07,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:03:07,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:07,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:07,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:07,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:03:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:07,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465961336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:07,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:03:07,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768844592] [2021-06-05 15:03:07,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:03:07,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:03:07,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:03:07,526 INFO L87 Difference]: Start difference. First operand 1256 states and 3034 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:09,223 INFO L93 Difference]: Finished difference Result 3308 states and 8149 transitions. [2021-06-05 15:03:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:03:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:09,226 INFO L225 Difference]: With dead ends: 3308 [2021-06-05 15:03:09,226 INFO L226 Difference]: Without dead ends: 3290 [2021-06-05 15:03:09,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1412.0ms TimeCoverageRelationStatistics Valid=648, Invalid=2774, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:03:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-06-05 15:03:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 1244. [2021-06-05 15:03:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.415124698310539) internal successors, (3002), 1243 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 3002 transitions. [2021-06-05 15:03:09,241 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 3002 transitions. Word has length 30 [2021-06-05 15:03:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:09,241 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 3002 transitions. [2021-06-05 15:03:09,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 3002 transitions. [2021-06-05 15:03:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:09,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:09,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:09,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 15:03:09,443 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash 629797713, now seen corresponding path program 40 times [2021-06-05 15:03:09,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:09,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573178911] [2021-06-05 15:03:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:09,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:09,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573178911] [2021-06-05 15:03:09,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573178911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:09,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699940024] [2021-06-05 15:03:09,629 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:09,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:09,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:09,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:09,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:09,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:03:09,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:09,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:09,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:09,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:03:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:09,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699940024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:09,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:09,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:03:09,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255612764] [2021-06-05 15:03:09,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:03:09,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:03:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:03:09,860 INFO L87 Difference]: Start difference. First operand 1244 states and 3002 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:11,072 INFO L93 Difference]: Finished difference Result 2644 states and 6448 transitions. [2021-06-05 15:03:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:03:11,072 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:11,074 INFO L225 Difference]: With dead ends: 2644 [2021-06-05 15:03:11,074 INFO L226 Difference]: Without dead ends: 2624 [2021-06-05 15:03:11,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:03:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-06-05 15:03:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 1232. [2021-06-05 15:03:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.4151096669374494) internal successors, (2973), 1231 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 2973 transitions. [2021-06-05 15:03:11,089 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 2973 transitions. Word has length 30 [2021-06-05 15:03:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:11,089 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 2973 transitions. [2021-06-05 15:03:11,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 2973 transitions. [2021-06-05 15:03:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:11,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:11,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:11,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 15:03:11,297 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:11,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1007774743, now seen corresponding path program 41 times [2021-06-05 15:03:11,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:11,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519032135] [2021-06-05 15:03:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:11,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:11,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519032135] [2021-06-05 15:03:11,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519032135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:11,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488215946] [2021-06-05 15:03:11,510 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:11,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:11,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:11,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:11,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:11,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:03:11,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:11,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:11,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:11,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:03:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:11,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488215946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:11,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:11,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:03:11,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818215477] [2021-06-05 15:03:11,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:03:11,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:03:11,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:03:11,767 INFO L87 Difference]: Start difference. First operand 1232 states and 2973 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:13,004 INFO L93 Difference]: Finished difference Result 2830 states and 6876 transitions. [2021-06-05 15:03:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:03:13,005 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:13,007 INFO L225 Difference]: With dead ends: 2830 [2021-06-05 15:03:13,007 INFO L226 Difference]: Without dead ends: 2766 [2021-06-05 15:03:13,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 958.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:03:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-05 15:03:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1215. [2021-06-05 15:03:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.412685337726524) internal successors, (2929), 1214 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2929 transitions. [2021-06-05 15:03:13,021 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2929 transitions. Word has length 30 [2021-06-05 15:03:13,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:13,021 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 2929 transitions. [2021-06-05 15:03:13,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2929 transitions. [2021-06-05 15:03:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:13,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:13,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:13,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:13,223 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:13,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1653788199, now seen corresponding path program 42 times [2021-06-05 15:03:13,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:13,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971358414] [2021-06-05 15:03:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:13,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:13,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971358414] [2021-06-05 15:03:13,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971358414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426498190] [2021-06-05 15:03:13,425 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:13,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:13,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:13,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:13,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:13,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:03:13,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:13,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:13,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:13,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:03:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:13,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426498190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:13,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:03:13,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238256528] [2021-06-05 15:03:13,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:03:13,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:13,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:03:13,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:03:13,656 INFO L87 Difference]: Start difference. First operand 1215 states and 2929 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:14,463 INFO L93 Difference]: Finished difference Result 2524 states and 6168 transitions. [2021-06-05 15:03:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:14,463 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:14,466 INFO L225 Difference]: With dead ends: 2524 [2021-06-05 15:03:14,466 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 15:03:14,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 592.8ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:03:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 15:03:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1212. [2021-06-05 15:03:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.4128819157720893) internal successors, (2922), 1211 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2922 transitions. [2021-06-05 15:03:14,479 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2922 transitions. Word has length 30 [2021-06-05 15:03:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:14,479 INFO L482 AbstractCegarLoop]: Abstraction has 1212 states and 2922 transitions. [2021-06-05 15:03:14,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2922 transitions. [2021-06-05 15:03:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:14,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:14,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:14,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:14,680 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:14,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2075383707, now seen corresponding path program 57 times [2021-06-05 15:03:14,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:14,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432722840] [2021-06-05 15:03:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:14,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:14,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432722840] [2021-06-05 15:03:14,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432722840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:14,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144934599] [2021-06-05 15:03:14,865 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:14,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:14,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:14,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:15,025 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:15,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:15,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:15,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:15,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-06-05 15:03:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:15,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144934599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:15,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:15,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2021-06-05 15:03:15,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493938702] [2021-06-05 15:03:15,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:03:15,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:15,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:03:15,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:03:15,073 INFO L87 Difference]: Start difference. First operand 1212 states and 2922 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:15,999 INFO L93 Difference]: Finished difference Result 2797 states and 6885 transitions. [2021-06-05 15:03:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:15,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:16,002 INFO L225 Difference]: With dead ends: 2797 [2021-06-05 15:03:16,002 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 15:03:16,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 718.2ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 15:03:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1237. [2021-06-05 15:03:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.4174757281553396) internal successors, (2988), 1236 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 2988 transitions. [2021-06-05 15:03:16,018 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 2988 transitions. Word has length 30 [2021-06-05 15:03:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:16,018 INFO L482 AbstractCegarLoop]: Abstraction has 1237 states and 2988 transitions. [2021-06-05 15:03:16,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 2988 transitions. [2021-06-05 15:03:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:16,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:16,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:16,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:16,219 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:16,219 INFO L82 PathProgramCache]: Analyzing trace with hash -318982657, now seen corresponding path program 58 times [2021-06-05 15:03:16,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:16,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922085311] [2021-06-05 15:03:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:16,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:16,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922085311] [2021-06-05 15:03:16,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922085311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:16,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676593796] [2021-06-05 15:03:16,413 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:16,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:16,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:16,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:16,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:16,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:16,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:16,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:16,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:16,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676593796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:16,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:16,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:03:16,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961623438] [2021-06-05 15:03:16,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:03:16,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:03:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:16,597 INFO L87 Difference]: Start difference. First operand 1237 states and 2988 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:17,514 INFO L93 Difference]: Finished difference Result 2899 states and 7154 transitions. [2021-06-05 15:03:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:03:17,515 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:17,518 INFO L225 Difference]: With dead ends: 2899 [2021-06-05 15:03:17,518 INFO L226 Difference]: Without dead ends: 2879 [2021-06-05 15:03:17,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 744.4ms TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:03:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-06-05 15:03:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 1231. [2021-06-05 15:03:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.415447154471545) internal successors, (2971), 1230 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2971 transitions. [2021-06-05 15:03:17,534 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2971 transitions. Word has length 30 [2021-06-05 15:03:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:17,534 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 2971 transitions. [2021-06-05 15:03:17,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2971 transitions. [2021-06-05 15:03:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:17,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:17,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:17,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-06-05 15:03:17,741 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1890322569, now seen corresponding path program 59 times [2021-06-05 15:03:17,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:17,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695428306] [2021-06-05 15:03:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:17,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:17,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695428306] [2021-06-05 15:03:17,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695428306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:17,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451532504] [2021-06-05 15:03:17,935 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:17,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:17,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:17,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:17,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:18,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:03:18,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:18,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:18,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:18,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:03:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:18,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451532504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:18,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:18,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:03:18,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042414386] [2021-06-05 15:03:18,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:03:18,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:18,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:03:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:03:18,132 INFO L87 Difference]: Start difference. First operand 1231 states and 2971 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:19,132 INFO L93 Difference]: Finished difference Result 2671 states and 6523 transitions. [2021-06-05 15:03:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:03:19,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:19,135 INFO L225 Difference]: With dead ends: 2671 [2021-06-05 15:03:19,135 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 15:03:19,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 725.5ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:03:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 15:03:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1216. [2021-06-05 15:03:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.4123456790123456) internal successors, (2931), 1215 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2931 transitions. [2021-06-05 15:03:19,150 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2931 transitions. Word has length 30 [2021-06-05 15:03:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:19,150 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 2931 transitions. [2021-06-05 15:03:19,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2931 transitions. [2021-06-05 15:03:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:19,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:19,151 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:19,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 15:03:19,351 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1091399703, now seen corresponding path program 60 times [2021-06-05 15:03:19,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:19,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119897295] [2021-06-05 15:03:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:19,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:19,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119897295] [2021-06-05 15:03:19,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119897295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:19,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820141474] [2021-06-05 15:03:19,547 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:19,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:19,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:03:19,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:19,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:19,752 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 28 treesize of output 32 [2021-06-05 15:03:19,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:19,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:19,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:19,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-06-05 15:03:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:19,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820141474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:19,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:19,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-06-05 15:03:19,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058892594] [2021-06-05 15:03:19,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:03:19,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:03:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:19,859 INFO L87 Difference]: Start difference. First operand 1216 states and 2931 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:20,524 INFO L93 Difference]: Finished difference Result 2623 states and 6432 transitions. [2021-06-05 15:03:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:20,526 INFO L225 Difference]: With dead ends: 2623 [2021-06-05 15:03:20,527 INFO L226 Difference]: Without dead ends: 2613 [2021-06-05 15:03:20,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 651.4ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-06-05 15:03:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1213. [2021-06-05 15:03:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.4125412541254128) internal successors, (2924), 1212 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2924 transitions. [2021-06-05 15:03:20,540 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2924 transitions. Word has length 30 [2021-06-05 15:03:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:20,540 INFO L482 AbstractCegarLoop]: Abstraction has 1213 states and 2924 transitions. [2021-06-05 15:03:20,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2924 transitions. [2021-06-05 15:03:20,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:20,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:20,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:20,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 15:03:20,742 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1904321965, now seen corresponding path program 61 times [2021-06-05 15:03:20,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:20,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365063668] [2021-06-05 15:03:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:20,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:20,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365063668] [2021-06-05 15:03:20,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365063668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:20,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516886755] [2021-06-05 15:03:20,965 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:20,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:20,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:21,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:21,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:21,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:21,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:21,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:21,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516886755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:21,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:21,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:03:21,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869862127] [2021-06-05 15:03:21,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:03:21,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:21,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:03:21,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:21,155 INFO L87 Difference]: Start difference. First operand 1213 states and 2924 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:22,190 INFO L93 Difference]: Finished difference Result 2690 states and 6621 transitions. [2021-06-05 15:03:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:03:22,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:22,193 INFO L225 Difference]: With dead ends: 2690 [2021-06-05 15:03:22,193 INFO L226 Difference]: Without dead ends: 2679 [2021-06-05 15:03:22,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 868.5ms TimeCoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-06-05 15:03:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 1231. [2021-06-05 15:03:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.4138211382113823) internal successors, (2969), 1230 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2969 transitions. [2021-06-05 15:03:22,207 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2969 transitions. Word has length 30 [2021-06-05 15:03:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:22,207 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 2969 transitions. [2021-06-05 15:03:22,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2969 transitions. [2021-06-05 15:03:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:22,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:22,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:22,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 15:03:22,409 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash -634244281, now seen corresponding path program 62 times [2021-06-05 15:03:22,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:22,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497475582] [2021-06-05 15:03:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:22,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:22,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497475582] [2021-06-05 15:03:22,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497475582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:22,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492766949] [2021-06-05 15:03:22,631 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:22,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:22,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:22,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:03:22,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:22,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:22,827 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 25 treesize of output 31 [2021-06-05 15:03:22,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:22,867 INFO L628 ElimStorePlain]: treesize reduction 10, result has 84.8 percent of original size [2021-06-05 15:03:22,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:22,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-06-05 15:03:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:22,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492766949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:22,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:22,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:03:22,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122357280] [2021-06-05 15:03:22,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:03:22,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:03:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:22,962 INFO L87 Difference]: Start difference. First operand 1231 states and 2969 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:24,124 INFO L93 Difference]: Finished difference Result 2727 states and 6736 transitions. [2021-06-05 15:03:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:03:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:24,127 INFO L225 Difference]: With dead ends: 2727 [2021-06-05 15:03:24,127 INFO L226 Difference]: Without dead ends: 2715 [2021-06-05 15:03:24,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 963.5ms TimeCoverageRelationStatistics Valid=310, Invalid=1330, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:03:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-06-05 15:03:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1233. [2021-06-05 15:03:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.414772727272727) internal successors, (2975), 1232 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2975 transitions. [2021-06-05 15:03:24,141 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2975 transitions. Word has length 30 [2021-06-05 15:03:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:24,141 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 2975 transitions. [2021-06-05 15:03:24,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2975 transitions. [2021-06-05 15:03:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:24,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:24,142 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:24,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:24,343 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:24,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1552194471, now seen corresponding path program 63 times [2021-06-05 15:03:24,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:24,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819891241] [2021-06-05 15:03:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:24,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:24,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819891241] [2021-06-05 15:03:24,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819891241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:24,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194560246] [2021-06-05 15:03:24,574 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:24,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:24,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:24,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:24,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:24,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:24,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:24,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:24,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194560246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:24,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:24,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:03:24,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911757761] [2021-06-05 15:03:24,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:03:24,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:24,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:03:24,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:03:24,766 INFO L87 Difference]: Start difference. First operand 1233 states and 2975 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:26,040 INFO L93 Difference]: Finished difference Result 3049 states and 7511 transitions. [2021-06-05 15:03:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:03:26,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:26,044 INFO L225 Difference]: With dead ends: 3049 [2021-06-05 15:03:26,044 INFO L226 Difference]: Without dead ends: 3027 [2021-06-05 15:03:26,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1171.2ms TimeCoverageRelationStatistics Valid=449, Invalid=1903, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:03:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2021-06-05 15:03:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 1225. [2021-06-05 15:03:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 2.4133986928104574) internal successors, (2954), 1224 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2954 transitions. [2021-06-05 15:03:26,061 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2954 transitions. Word has length 30 [2021-06-05 15:03:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:26,061 INFO L482 AbstractCegarLoop]: Abstraction has 1225 states and 2954 transitions. [2021-06-05 15:03:26,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2954 transitions. [2021-06-05 15:03:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:26,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:26,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:26,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 15:03:26,264 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:26,265 INFO L82 PathProgramCache]: Analyzing trace with hash 894709787, now seen corresponding path program 64 times [2021-06-05 15:03:26,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:26,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523780767] [2021-06-05 15:03:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:26,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:26,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523780767] [2021-06-05 15:03:26,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523780767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:26,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353144526] [2021-06-05 15:03:26,499 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:26,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:26,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:26,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:03:26,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:26,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:26,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:26,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 15:03:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:26,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353144526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:26,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:26,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:03:26,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777705677] [2021-06-05 15:03:26,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:03:26,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:03:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:03:26,696 INFO L87 Difference]: Start difference. First operand 1225 states and 2954 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:27,657 INFO L93 Difference]: Finished difference Result 2509 states and 6155 transitions. [2021-06-05 15:03:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:27,658 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:27,660 INFO L225 Difference]: With dead ends: 2509 [2021-06-05 15:03:27,660 INFO L226 Difference]: Without dead ends: 2486 [2021-06-05 15:03:27,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:03:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-05 15:03:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1216. [2021-06-05 15:03:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.4123456790123456) internal successors, (2931), 1215 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2931 transitions. [2021-06-05 15:03:27,673 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2931 transitions. Word has length 30 [2021-06-05 15:03:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:27,673 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 2931 transitions. [2021-06-05 15:03:27,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2931 transitions. [2021-06-05 15:03:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:27,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:27,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:27,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:27,874 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:27,875 INFO L82 PathProgramCache]: Analyzing trace with hash 577864591, now seen corresponding path program 65 times [2021-06-05 15:03:27,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:27,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613247090] [2021-06-05 15:03:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:28,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:28,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613247090] [2021-06-05 15:03:28,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613247090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:28,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82088130] [2021-06-05 15:03:28,119 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:28,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:28,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:28,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:28,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:28,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:28,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:28,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:28,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82088130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:28,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:28,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:03:28,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816158827] [2021-06-05 15:03:28,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:03:28,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:28,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:03:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:28,300 INFO L87 Difference]: Start difference. First operand 1216 states and 2931 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:29,476 INFO L93 Difference]: Finished difference Result 2693 states and 6622 transitions. [2021-06-05 15:03:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:03:29,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:29,479 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 15:03:29,479 INFO L226 Difference]: Without dead ends: 2682 [2021-06-05 15:03:29,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:03:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-05 15:03:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1225. [2021-06-05 15:03:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 2.411764705882353) internal successors, (2952), 1224 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2952 transitions. [2021-06-05 15:03:29,494 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2952 transitions. Word has length 30 [2021-06-05 15:03:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:29,494 INFO L482 AbstractCegarLoop]: Abstraction has 1225 states and 2952 transitions. [2021-06-05 15:03:29,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2952 transitions. [2021-06-05 15:03:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:29,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:29,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:29,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 15:03:29,695 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1960701655, now seen corresponding path program 66 times [2021-06-05 15:03:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:29,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106863740] [2021-06-05 15:03:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:29,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:29,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106863740] [2021-06-05 15:03:29,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106863740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:29,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971601902] [2021-06-05 15:03:29,946 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:29,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:29,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:29,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:29,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:30,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:30,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:30,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:30,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:30,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:30,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971601902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:30,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:30,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:03:30,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456936073] [2021-06-05 15:03:30,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:03:30,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:30,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:03:30,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:30,131 INFO L87 Difference]: Start difference. First operand 1225 states and 2952 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:31,284 INFO L93 Difference]: Finished difference Result 2824 states and 6974 transitions. [2021-06-05 15:03:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:03:31,284 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:31,287 INFO L225 Difference]: With dead ends: 2824 [2021-06-05 15:03:31,287 INFO L226 Difference]: Without dead ends: 2804 [2021-06-05 15:03:31,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:03:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-06-05 15:03:31,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1218. [2021-06-05 15:03:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.4124897288414133) internal successors, (2936), 1217 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2936 transitions. [2021-06-05 15:03:31,306 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2936 transitions. Word has length 30 [2021-06-05 15:03:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:31,306 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 2936 transitions. [2021-06-05 15:03:31,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2936 transitions. [2021-06-05 15:03:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:31,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:31,307 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:31,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:31,508 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1846725739, now seen corresponding path program 67 times [2021-06-05 15:03:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:31,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300946012] [2021-06-05 15:03:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:31,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:31,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300946012] [2021-06-05 15:03:31,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300946012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058901823] [2021-06-05 15:03:31,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:31,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:31,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:31,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:31,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:31,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:31,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:31,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:03:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:31,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058901823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:31,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 15:03:31,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497005181] [2021-06-05 15:03:31,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:03:31,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:31,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:03:31,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:31,908 INFO L87 Difference]: Start difference. First operand 1218 states and 2936 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:33,257 INFO L93 Difference]: Finished difference Result 2573 states and 6331 transitions. [2021-06-05 15:03:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:03:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:33,260 INFO L225 Difference]: With dead ends: 2573 [2021-06-05 15:03:33,260 INFO L226 Difference]: Without dead ends: 2564 [2021-06-05 15:03:33,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 819.8ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:03:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-06-05 15:03:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1211. [2021-06-05 15:03:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 2.4132231404958677) internal successors, (2920), 1210 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2920 transitions. [2021-06-05 15:03:33,274 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2920 transitions. Word has length 30 [2021-06-05 15:03:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:33,274 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 2920 transitions. [2021-06-05 15:03:33,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2920 transitions. [2021-06-05 15:03:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:33,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:33,275 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:33,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:33,476 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:33,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1325848085, now seen corresponding path program 68 times [2021-06-05 15:03:33,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:33,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237030726] [2021-06-05 15:03:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:33,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:33,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237030726] [2021-06-05 15:03:33,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237030726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:33,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550629205] [2021-06-05 15:03:33,717 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:33,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:33,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:33,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:33,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:33,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:33,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:33,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:33,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:33,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:33,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550629205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:33,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:33,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:03:33,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711163499] [2021-06-05 15:03:33,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:03:33,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:33,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:03:33,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:33,907 INFO L87 Difference]: Start difference. First operand 1211 states and 2920 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,942 INFO L93 Difference]: Finished difference Result 2900 states and 7078 transitions. [2021-06-05 15:03:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:03:35,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,953 INFO L225 Difference]: With dead ends: 2900 [2021-06-05 15:03:35,953 INFO L226 Difference]: Without dead ends: 2882 [2021-06-05 15:03:35,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1596.2ms TimeCoverageRelationStatistics Valid=504, Invalid=2466, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:03:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-06-05 15:03:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 1185. [2021-06-05 15:03:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 2.410472972972973) internal successors, (2854), 1184 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2854 transitions. [2021-06-05 15:03:35,968 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2854 transitions. Word has length 30 [2021-06-05 15:03:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,968 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 2854 transitions. [2021-06-05 15:03:35,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2854 transitions. [2021-06-05 15:03:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:35,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:36,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,170 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:36,170 INFO L82 PathProgramCache]: Analyzing trace with hash -585794405, now seen corresponding path program 43 times [2021-06-05 15:03:36,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:36,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439956384] [2021-06-05 15:03:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439956384] [2021-06-05 15:03:36,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439956384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391517391] [2021-06-05 15:03:36,390 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:36,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:36,621 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 15:03:36,621 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-06-05 15:03:36,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:36,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:36,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:36,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:19 [2021-06-05 15:03:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391517391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:36,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:03:36,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797395644] [2021-06-05 15:03:36,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:36,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:36,655 INFO L87 Difference]: Start difference. First operand 1185 states and 2854 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:38,288 INFO L93 Difference]: Finished difference Result 2605 states and 6398 transitions. [2021-06-05 15:03:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:03:38,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:38,291 INFO L225 Difference]: With dead ends: 2605 [2021-06-05 15:03:38,291 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 15:03:38,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1281.6ms TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:03:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 15:03:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1172. [2021-06-05 15:03:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 2.4064901793339026) internal successors, (2818), 1171 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 2818 transitions. [2021-06-05 15:03:38,305 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 2818 transitions. Word has length 30 [2021-06-05 15:03:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:38,305 INFO L482 AbstractCegarLoop]: Abstraction has 1172 states and 2818 transitions. [2021-06-05 15:03:38,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 2818 transitions. [2021-06-05 15:03:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:38,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:38,306 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:38,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:38,506 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash -118748835, now seen corresponding path program 44 times [2021-06-05 15:03:38,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:38,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554275111] [2021-06-05 15:03:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554275111] [2021-06-05 15:03:38,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554275111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121884785] [2021-06-05 15:03:38,735 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:38,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:38,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:38,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:38,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:38,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:03:38,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:38,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:03:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121884785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:38,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:03:38,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678607352] [2021-06-05 15:03:38,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:03:38,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:03:38,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:38,928 INFO L87 Difference]: Start difference. First operand 1172 states and 2818 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:41,538 INFO L93 Difference]: Finished difference Result 2848 states and 6937 transitions. [2021-06-05 15:03:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:03:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:41,540 INFO L225 Difference]: With dead ends: 2848 [2021-06-05 15:03:41,541 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 15:03:41,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2261.2ms TimeCoverageRelationStatistics Valid=698, Invalid=3724, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:03:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 15:03:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1151. [2021-06-05 15:03:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 2.4043478260869566) internal successors, (2765), 1150 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2765 transitions. [2021-06-05 15:03:41,555 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2765 transitions. Word has length 30 [2021-06-05 15:03:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:41,555 INFO L482 AbstractCegarLoop]: Abstraction has 1151 states and 2765 transitions. [2021-06-05 15:03:41,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2765 transitions. [2021-06-05 15:03:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:41,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:41,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:41,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-06-05 15:03:41,756 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1468185983, now seen corresponding path program 69 times [2021-06-05 15:03:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:41,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742200692] [2021-06-05 15:03:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:41,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:41,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742200692] [2021-06-05 15:03:41,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742200692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:41,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947599007] [2021-06-05 15:03:41,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:42,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:03:42,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:42,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:42,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:42,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:42,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:42,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:42,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:42,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:03:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:42,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947599007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:42,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:42,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:03:42,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262106985] [2021-06-05 15:03:42,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:03:42,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:42,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:03:42,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:03:42,200 INFO L87 Difference]: Start difference. First operand 1151 states and 2765 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-06-05 15:03:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:45,239 INFO L93 Difference]: Finished difference Result 2564 states and 6222 transitions. [2021-06-05 15:03:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:03:45,239 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 30 [2021-06-05 15:03:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:45,242 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 15:03:45,242 INFO L226 Difference]: Without dead ends: 2539 [2021-06-05 15:03:45,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2432.4ms TimeCoverageRelationStatistics Valid=705, Invalid=3717, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:03:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-06-05 15:03:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1168. [2021-06-05 15:03:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.405312767780634) internal successors, (2807), 1167 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2807 transitions. [2021-06-05 15:03:45,254 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2807 transitions. Word has length 30 [2021-06-05 15:03:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:45,254 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2807 transitions. [2021-06-05 15:03:45,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-06-05 15:03:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2807 transitions. [2021-06-05 15:03:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:45,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:45,255 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:45,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 15:03:45,456 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash -692414559, now seen corresponding path program 70 times [2021-06-05 15:03:45,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:45,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295512264] [2021-06-05 15:03:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:45,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:45,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295512264] [2021-06-05 15:03:45,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295512264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002006063] [2021-06-05 15:03:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:45,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:45,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:45,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:45,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:45,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:45,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:45,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:45,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:45,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002006063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:45,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:03:45,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562185176] [2021-06-05 15:03:45,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:03:45,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:45,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:03:45,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:03:45,887 INFO L87 Difference]: Start difference. First operand 1168 states and 2807 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:49,856 INFO L93 Difference]: Finished difference Result 3160 states and 7720 transitions. [2021-06-05 15:03:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 15:03:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:49,859 INFO L225 Difference]: With dead ends: 3160 [2021-06-05 15:03:49,859 INFO L226 Difference]: Without dead ends: 3145 [2021-06-05 15:03:49,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 3320.4ms TimeCoverageRelationStatistics Valid=1129, Invalid=6011, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:03:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-06-05 15:03:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 1180. [2021-06-05 15:03:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 2.4062765055131465) internal successors, (2837), 1179 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 2837 transitions. [2021-06-05 15:03:49,874 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 2837 transitions. Word has length 30 [2021-06-05 15:03:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:49,875 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 2837 transitions. [2021-06-05 15:03:49,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 2837 transitions. [2021-06-05 15:03:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:49,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:49,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:50,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 15:03:50,076 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:50,076 INFO L82 PathProgramCache]: Analyzing trace with hash -27211391, now seen corresponding path program 71 times [2021-06-05 15:03:50,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:50,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342910045] [2021-06-05 15:03:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:50,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342910045] [2021-06-05 15:03:50,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342910045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170232582] [2021-06-05 15:03:50,317 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:50,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:03:50,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:50,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:50,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:50,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:50,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:50,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:50,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170232582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:50,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:03:50,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782502889] [2021-06-05 15:03:50,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:03:50,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:50,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:03:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:50,499 INFO L87 Difference]: Start difference. First operand 1180 states and 2837 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:53,328 INFO L93 Difference]: Finished difference Result 2821 states and 6912 transitions. [2021-06-05 15:03:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:03:53,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:53,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:53,332 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 15:03:53,332 INFO L226 Difference]: Without dead ends: 2804 [2021-06-05 15:03:53,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2153.3ms TimeCoverageRelationStatistics Valid=594, Invalid=3066, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:03:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-06-05 15:03:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1171. [2021-06-05 15:03:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.404273504273504) internal successors, (2813), 1170 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2813 transitions. [2021-06-05 15:03:53,346 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2813 transitions. Word has length 30 [2021-06-05 15:03:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:53,346 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2813 transitions. [2021-06-05 15:03:53,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2813 transitions. [2021-06-05 15:03:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:53,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:53,348 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:53,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 15:03:53,557 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash 971041919, now seen corresponding path program 72 times [2021-06-05 15:03:53,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:53,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500708338] [2021-06-05 15:03:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:53,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500708338] [2021-06-05 15:03:53,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500708338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843354110] [2021-06-05 15:03:53,789 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:53,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:03:53,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:53,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:53,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:53,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:53,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:53,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:53,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:03:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:54,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843354110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:54,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:03:54,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983338937] [2021-06-05 15:03:54,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:03:54,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:54,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:03:54,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:03:54,006 INFO L87 Difference]: Start difference. First operand 1171 states and 2813 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:57,191 INFO L93 Difference]: Finished difference Result 2554 states and 6198 transitions. [2021-06-05 15:03:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:03:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:57,194 INFO L225 Difference]: With dead ends: 2554 [2021-06-05 15:03:57,194 INFO L226 Difference]: Without dead ends: 2535 [2021-06-05 15:03:57,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 2508.6ms TimeCoverageRelationStatistics Valid=739, Invalid=3817, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:03:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-06-05 15:03:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1167. [2021-06-05 15:03:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.4056603773584904) internal successors, (2805), 1166 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2805 transitions. [2021-06-05 15:03:57,208 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2805 transitions. Word has length 30 [2021-06-05 15:03:57,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:57,208 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 2805 transitions. [2021-06-05 15:03:57,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2805 transitions. [2021-06-05 15:03:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:57,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:57,209 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:57,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 15:03:57,409 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash 580935999, now seen corresponding path program 73 times [2021-06-05 15:03:57,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:57,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005642166] [2021-06-05 15:03:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:57,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:57,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005642166] [2021-06-05 15:03:57,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005642166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:57,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560788632] [2021-06-05 15:03:57,682 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:57,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:57,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:57,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:57,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:57,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:57,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:57,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560788632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:57,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:57,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:03:57,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756102964] [2021-06-05 15:03:57,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:03:57,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:57,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:03:57,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:57,850 INFO L87 Difference]: Start difference. First operand 1167 states and 2805 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:59,352 INFO L93 Difference]: Finished difference Result 3143 states and 7792 transitions. [2021-06-05 15:03:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:03:59,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:03:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:59,356 INFO L225 Difference]: With dead ends: 3143 [2021-06-05 15:03:59,356 INFO L226 Difference]: Without dead ends: 3130 [2021-06-05 15:03:59,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1278.8ms TimeCoverageRelationStatistics Valid=408, Invalid=1848, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:03:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2021-06-05 15:03:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 1176. [2021-06-05 15:03:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.4051063829787234) internal successors, (2826), 1175 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2826 transitions. [2021-06-05 15:03:59,374 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2826 transitions. Word has length 30 [2021-06-05 15:03:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:59,374 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 2826 transitions. [2021-06-05 15:03:59,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2826 transitions. [2021-06-05 15:03:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:03:59,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:59,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:59,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 15:03:59,575 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1957630247, now seen corresponding path program 74 times [2021-06-05 15:03:59,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:59,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247738029] [2021-06-05 15:03:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:59,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:59,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247738029] [2021-06-05 15:03:59,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247738029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483918821] [2021-06-05 15:03:59,816 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:59,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:59,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:59,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:59,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:59,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:03:59,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:59,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:59,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:59,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:03:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:59,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483918821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:59,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:03:59,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185652703] [2021-06-05 15:03:59,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:03:59,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:59,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:03:59,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:59,982 INFO L87 Difference]: Start difference. First operand 1176 states and 2826 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:01,362 INFO L93 Difference]: Finished difference Result 2923 states and 7239 transitions. [2021-06-05 15:04:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:04:01,363 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:01,365 INFO L225 Difference]: With dead ends: 2923 [2021-06-05 15:04:01,365 INFO L226 Difference]: Without dead ends: 2906 [2021-06-05 15:04:01,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1131.5ms TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:04:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2021-06-05 15:04:01,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 1167. [2021-06-05 15:04:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.4039451114922814) internal successors, (2803), 1166 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2803 transitions. [2021-06-05 15:04:01,380 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2803 transitions. Word has length 30 [2021-06-05 15:04:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:01,380 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 2803 transitions. [2021-06-05 15:04:01,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2803 transitions. [2021-06-05 15:04:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:01,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:01,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:01,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,581 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash -428676179, now seen corresponding path program 75 times [2021-06-05 15:04:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:01,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379420719] [2021-06-05 15:04:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:01,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379420719] [2021-06-05 15:04:01,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379420719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948814181] [2021-06-05 15:04:01,810 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:04:01,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:01,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:02,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:02,091 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 15:04:02,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:02,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:10 [2021-06-05 15:04:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948814181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:02,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 15:04:02,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035954951] [2021-06-05 15:04:02,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:02,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:02,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:02,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:02,120 INFO L87 Difference]: Start difference. First operand 1167 states and 2803 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:03,301 INFO L93 Difference]: Finished difference Result 2453 states and 6052 transitions. [2021-06-05 15:04:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:04:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:03,304 INFO L225 Difference]: With dead ends: 2453 [2021-06-05 15:04:03,304 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 15:04:03,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 886.3ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 15:04:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1158. [2021-06-05 15:04:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 2.4019014693172) internal successors, (2779), 1157 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 2779 transitions. [2021-06-05 15:04:03,317 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 2779 transitions. Word has length 30 [2021-06-05 15:04:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:03,317 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 2779 transitions. [2021-06-05 15:04:03,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 2779 transitions. [2021-06-05 15:04:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:03,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:03,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:03,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-06-05 15:04:03,519 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash 645569505, now seen corresponding path program 76 times [2021-06-05 15:04:03,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:03,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391082356] [2021-06-05 15:04:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:03,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391082356] [2021-06-05 15:04:03,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391082356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814849373] [2021-06-05 15:04:03,771 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:03,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:03,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:03,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:03,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:03,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:04:03,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:03,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:03,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:03,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:04:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814849373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:03,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:04:03,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220264354] [2021-06-05 15:04:03,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:03,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:03,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:03,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:03,950 INFO L87 Difference]: Start difference. First operand 1158 states and 2779 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:05,752 INFO L93 Difference]: Finished difference Result 2761 states and 6788 transitions. [2021-06-05 15:04:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:04:05,753 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:05,755 INFO L225 Difference]: With dead ends: 2761 [2021-06-05 15:04:05,755 INFO L226 Difference]: Without dead ends: 2748 [2021-06-05 15:04:05,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1534.2ms TimeCoverageRelationStatistics Valid=438, Invalid=2318, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:04:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-06-05 15:04:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 1170. [2021-06-05 15:04:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.402908468776732) internal successors, (2809), 1169 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2809 transitions. [2021-06-05 15:04:05,770 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2809 transitions. Word has length 30 [2021-06-05 15:04:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:05,770 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 2809 transitions. [2021-06-05 15:04:05,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2809 transitions. [2021-06-05 15:04:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:05,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:05,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:05,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:05,971 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1892996741, now seen corresponding path program 77 times [2021-06-05 15:04:05,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:05,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449651772] [2021-06-05 15:04:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:06,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:06,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449651772] [2021-06-05 15:04:06,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449651772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025103911] [2021-06-05 15:04:06,226 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:06,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:04:06,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:06,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:06,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:04:06,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:06,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:06,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:06,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:04:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:06,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025103911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:06,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 15:04:06,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104975783] [2021-06-05 15:04:06,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:06,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:06,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:06,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:06,403 INFO L87 Difference]: Start difference. First operand 1170 states and 2809 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:07,849 INFO L93 Difference]: Finished difference Result 2604 states and 6401 transitions. [2021-06-05 15:04:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:04:07,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:07,852 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 15:04:07,852 INFO L226 Difference]: Without dead ends: 2587 [2021-06-05 15:04:07,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1192.8ms TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:04:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-06-05 15:04:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1161. [2021-06-05 15:04:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.4008620689655173) internal successors, (2785), 1160 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2785 transitions. [2021-06-05 15:04:07,866 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2785 transitions. Word has length 30 [2021-06-05 15:04:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:07,866 INFO L482 AbstractCegarLoop]: Abstraction has 1161 states and 2785 transitions. [2021-06-05 15:04:07,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2785 transitions. [2021-06-05 15:04:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:07,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:07,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:08,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:08,068 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:08,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:08,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1779020825, now seen corresponding path program 78 times [2021-06-05 15:04:08,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:08,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517342308] [2021-06-05 15:04:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:08,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:08,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517342308] [2021-06-05 15:04:08,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517342308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202526582] [2021-06-05 15:04:08,330 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:08,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:04:08,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:08,353 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:08,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:08,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:04:08,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:08,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:08,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:08,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:04:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:08,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202526582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:08,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:04:08,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910214829] [2021-06-05 15:04:08,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:08,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:08,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:08,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:08,528 INFO L87 Difference]: Start difference. First operand 1161 states and 2785 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:11,238 INFO L93 Difference]: Finished difference Result 2475 states and 6013 transitions. [2021-06-05 15:04:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:04:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:11,241 INFO L225 Difference]: With dead ends: 2475 [2021-06-05 15:04:11,241 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 15:04:11,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 2168.4ms TimeCoverageRelationStatistics Valid=661, Invalid=3761, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:04:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 15:04:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1158. [2021-06-05 15:04:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 2.4019014693172) internal successors, (2779), 1157 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 2779 transitions. [2021-06-05 15:04:11,254 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 2779 transitions. Word has length 30 [2021-06-05 15:04:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:11,254 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 2779 transitions. [2021-06-05 15:04:11,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 2779 transitions. [2021-06-05 15:04:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:11,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:11,255 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:11,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,456 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1320989679, now seen corresponding path program 45 times [2021-06-05 15:04:11,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:11,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322130342] [2021-06-05 15:04:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:11,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322130342] [2021-06-05 15:04:11,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322130342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824879639] [2021-06-05 15:04:11,706 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:04:11,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:11,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 15:04:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:11,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:12,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:12,002 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 25 treesize of output 33 [2021-06-05 15:04:12,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:12,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:12,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:12,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:55 [2021-06-05 15:04:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:12,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824879639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:12,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:12,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 15:04:12,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291211183] [2021-06-05 15:04:12,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:04:12,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:04:12,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:04:12,123 INFO L87 Difference]: Start difference. First operand 1158 states and 2779 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:16,109 INFO L93 Difference]: Finished difference Result 2626 states and 6363 transitions. [2021-06-05 15:04:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:04:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 30 [2021-06-05 15:04:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:16,111 INFO L225 Difference]: With dead ends: 2626 [2021-06-05 15:04:16,112 INFO L226 Difference]: Without dead ends: 2611 [2021-06-05 15:04:16,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 3050.4ms TimeCoverageRelationStatistics Valid=839, Invalid=5967, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:04:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-06-05 15:04:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 1169. [2021-06-05 15:04:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 2.4006849315068495) internal successors, (2804), 1168 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 2804 transitions. [2021-06-05 15:04:16,124 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 2804 transitions. Word has length 30 [2021-06-05 15:04:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:16,124 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 2804 transitions. [2021-06-05 15:04:16,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 2804 transitions. [2021-06-05 15:04:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:16,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:16,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:16,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:16,326 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:16,326 INFO L82 PathProgramCache]: Analyzing trace with hash 700502543, now seen corresponding path program 46 times [2021-06-05 15:04:16,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:16,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919336351] [2021-06-05 15:04:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:16,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:16,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919336351] [2021-06-05 15:04:16,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919336351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:16,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423952126] [2021-06-05 15:04:16,570 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:16,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:16,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:16,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:16,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:16,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:16,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:16,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:16,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:04:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:16,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423952126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:16,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:16,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:04:16,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061369487] [2021-06-05 15:04:16,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:16,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:16,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:16,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:16,776 INFO L87 Difference]: Start difference. First operand 1169 states and 2804 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:20,081 INFO L93 Difference]: Finished difference Result 3180 states and 7763 transitions. [2021-06-05 15:04:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:04:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:20,085 INFO L225 Difference]: With dead ends: 3180 [2021-06-05 15:04:20,085 INFO L226 Difference]: Without dead ends: 3165 [2021-06-05 15:04:20,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2443 ImplicationChecksByTransitivity, 2755.5ms TimeCoverageRelationStatistics Valid=1123, Invalid=5849, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:04:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-06-05 15:04:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1186. [2021-06-05 15:04:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 2.40337552742616) internal successors, (2848), 1185 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 2848 transitions. [2021-06-05 15:04:20,100 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 2848 transitions. Word has length 30 [2021-06-05 15:04:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:20,100 INFO L482 AbstractCegarLoop]: Abstraction has 1186 states and 2848 transitions. [2021-06-05 15:04:20,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 2848 transitions. [2021-06-05 15:04:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:20,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:20,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:20,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 15:04:20,302 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1365705711, now seen corresponding path program 47 times [2021-06-05 15:04:20,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:20,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779799979] [2021-06-05 15:04:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:20,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:20,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779799979] [2021-06-05 15:04:20,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779799979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72837563] [2021-06-05 15:04:20,549 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:20,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:04:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:20,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:20,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:20,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:04:20,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:20,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:20,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:20,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:04:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:20,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72837563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:20,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:04:20,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560062551] [2021-06-05 15:04:20,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:20,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:20,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:20,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:20,769 INFO L87 Difference]: Start difference. First operand 1186 states and 2848 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:23,340 INFO L93 Difference]: Finished difference Result 2825 states and 6909 transitions. [2021-06-05 15:04:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:04:23,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:23,344 INFO L225 Difference]: With dead ends: 2825 [2021-06-05 15:04:23,344 INFO L226 Difference]: Without dead ends: 2805 [2021-06-05 15:04:23,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1785.5ms TimeCoverageRelationStatistics Valid=603, Invalid=3179, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:04:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-06-05 15:04:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 1168. [2021-06-05 15:04:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.4010282776349614) internal successors, (2802), 1167 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2802 transitions. [2021-06-05 15:04:23,359 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2802 transitions. Word has length 30 [2021-06-05 15:04:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:23,360 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2802 transitions. [2021-06-05 15:04:23,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2802 transitions. [2021-06-05 15:04:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:23,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:23,361 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:23,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 15:04:23,561 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:23,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1788035249, now seen corresponding path program 48 times [2021-06-05 15:04:23,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:23,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000361896] [2021-06-05 15:04:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:23,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000361896] [2021-06-05 15:04:23,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000361896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767616808] [2021-06-05 15:04:23,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:23,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:04:23,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:23,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:23,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:23,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:23,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:23,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:23,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:04:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767616808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:23,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:04:23,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73320031] [2021-06-05 15:04:23,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:23,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:23,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:23,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:23,982 INFO L87 Difference]: Start difference. First operand 1168 states and 2802 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:25,917 INFO L93 Difference]: Finished difference Result 2831 states and 6972 transitions. [2021-06-05 15:04:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:04:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:25,920 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 15:04:25,920 INFO L226 Difference]: Without dead ends: 2818 [2021-06-05 15:04:25,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1609.0ms TimeCoverageRelationStatistics Valid=498, Invalid=2808, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:04:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-06-05 15:04:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 1179. [2021-06-05 15:04:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.402376910016978) internal successors, (2830), 1178 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 2830 transitions. [2021-06-05 15:04:25,934 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 2830 transitions. Word has length 30 [2021-06-05 15:04:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:25,934 INFO L482 AbstractCegarLoop]: Abstraction has 1179 states and 2830 transitions. [2021-06-05 15:04:25,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 2830 transitions. [2021-06-05 15:04:25,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:25,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:25,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:26,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:26,137 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:26,137 INFO L82 PathProgramCache]: Analyzing trace with hash -750530997, now seen corresponding path program 49 times [2021-06-05 15:04:26,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:26,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446251026] [2021-06-05 15:04:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:26,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:26,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446251026] [2021-06-05 15:04:26,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446251026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:26,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228014069] [2021-06-05 15:04:26,369 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:26,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:26,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:26,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:26,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:04:26,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:26,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:26,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:26,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:04:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:26,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228014069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:26,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:26,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:04:26,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648040520] [2021-06-05 15:04:26,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:26,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:26,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:26,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:26,599 INFO L87 Difference]: Start difference. First operand 1179 states and 2830 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:28,241 INFO L93 Difference]: Finished difference Result 2688 states and 6622 transitions. [2021-06-05 15:04:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:04:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:28,245 INFO L225 Difference]: With dead ends: 2688 [2021-06-05 15:04:28,245 INFO L226 Difference]: Without dead ends: 2671 [2021-06-05 15:04:28,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1235.6ms TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:04:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-06-05 15:04:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1171. [2021-06-05 15:04:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.4008547008547008) internal successors, (2809), 1170 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2809 transitions. [2021-06-05 15:04:28,260 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2809 transitions. Word has length 30 [2021-06-05 15:04:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:28,260 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2809 transitions. [2021-06-05 15:04:28,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2809 transitions. [2021-06-05 15:04:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:28,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:28,261 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:28,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 15:04:28,462 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:28,462 INFO L82 PathProgramCache]: Analyzing trace with hash -215086789, now seen corresponding path program 50 times [2021-06-05 15:04:28,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:28,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626356227] [2021-06-05 15:04:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:28,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:28,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626356227] [2021-06-05 15:04:28,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626356227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865876690] [2021-06-05 15:04:28,707 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:04:28,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:28,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:28,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:28,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:28,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:28,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:28,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:28,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:28,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:04:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:28,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865876690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:28,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:04:28,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150214432] [2021-06-05 15:04:28,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:28,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:28,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:28,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:28,984 INFO L87 Difference]: Start difference. First operand 1171 states and 2809 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:30,819 INFO L93 Difference]: Finished difference Result 2685 states and 6598 transitions. [2021-06-05 15:04:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:04:30,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:30,822 INFO L225 Difference]: With dead ends: 2685 [2021-06-05 15:04:30,822 INFO L226 Difference]: Without dead ends: 2675 [2021-06-05 15:04:30,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1218.7ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:04:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2021-06-05 15:04:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 1170. [2021-06-05 15:04:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.4011976047904193) internal successors, (2807), 1169 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2807 transitions. [2021-06-05 15:04:30,836 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2807 transitions. Word has length 30 [2021-06-05 15:04:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:30,836 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 2807 transitions. [2021-06-05 15:04:30,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2807 transitions. [2021-06-05 15:04:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:30,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:30,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:31,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:31,053 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1247603719, now seen corresponding path program 51 times [2021-06-05 15:04:31,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:31,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594664353] [2021-06-05 15:04:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:31,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:31,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594664353] [2021-06-05 15:04:31,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594664353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:31,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125156771] [2021-06-05 15:04:31,274 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:31,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:04:31,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:31,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:04:31,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:31,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:31,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:31,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:31,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 15:04:31,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:31,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:31,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:31,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:30 [2021-06-05 15:04:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:31,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125156771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:31,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:31,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-06-05 15:04:31,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257196524] [2021-06-05 15:04:31,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:04:31,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:31,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:04:31,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:04:31,709 INFO L87 Difference]: Start difference. First operand 1170 states and 2807 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:04:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:34,142 INFO L93 Difference]: Finished difference Result 2565 states and 6313 transitions. [2021-06-05 15:04:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:04:34,142 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:34,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:34,145 INFO L225 Difference]: With dead ends: 2565 [2021-06-05 15:04:34,145 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 15:04:34,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1973.7ms TimeCoverageRelationStatistics Valid=479, Invalid=3061, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:04:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 15:04:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1174. [2021-06-05 15:04:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 2.403239556692242) internal successors, (2819), 1173 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 2819 transitions. [2021-06-05 15:04:34,158 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 2819 transitions. Word has length 30 [2021-06-05 15:04:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:34,158 INFO L482 AbstractCegarLoop]: Abstraction has 1174 states and 2819 transitions. [2021-06-05 15:04:34,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:04:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 2819 transitions. [2021-06-05 15:04:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:34,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:34,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:34,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:34,360 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:34,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1290962527, now seen corresponding path program 52 times [2021-06-05 15:04:34,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:34,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985133630] [2021-06-05 15:04:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:34,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:34,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985133630] [2021-06-05 15:04:34,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985133630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:34,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136961420] [2021-06-05 15:04:34,568 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:34,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:34,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:34,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:34,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:34,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:34,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:34,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:34,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:34,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:04:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:34,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136961420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:34,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:34,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:04:34,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364959312] [2021-06-05 15:04:34,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:34,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:34,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:34,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:34,763 INFO L87 Difference]: Start difference. First operand 1174 states and 2819 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:36,612 INFO L93 Difference]: Finished difference Result 2735 states and 6750 transitions. [2021-06-05 15:04:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:04:36,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:36,617 INFO L225 Difference]: With dead ends: 2735 [2021-06-05 15:04:36,617 INFO L226 Difference]: Without dead ends: 2721 [2021-06-05 15:04:36,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1568.7ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:04:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-05 15:04:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 1214. [2021-06-05 15:04:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.410552349546579) internal successors, (2924), 1213 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2924 transitions. [2021-06-05 15:04:36,631 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2924 transitions. Word has length 30 [2021-06-05 15:04:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:36,631 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 2924 transitions. [2021-06-05 15:04:36,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2924 transitions. [2021-06-05 15:04:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:36,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:36,632 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:36,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 15:04:36,832 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash -755518319, now seen corresponding path program 53 times [2021-06-05 15:04:36,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:36,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859994188] [2021-06-05 15:04:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:37,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:37,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859994188] [2021-06-05 15:04:37,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859994188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707017094] [2021-06-05 15:04:37,061 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:37,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:04:37,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:37,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:37,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:37,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:37,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:37,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:37,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:37,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:04:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:37,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707017094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:37,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:04:37,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496749192] [2021-06-05 15:04:37,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:37,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:37,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:37,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:37,303 INFO L87 Difference]: Start difference. First operand 1214 states and 2924 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:39,005 INFO L93 Difference]: Finished difference Result 2643 states and 6515 transitions. [2021-06-05 15:04:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:04:39,005 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:39,008 INFO L225 Difference]: With dead ends: 2643 [2021-06-05 15:04:39,008 INFO L226 Difference]: Without dead ends: 2633 [2021-06-05 15:04:39,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1324.1ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:04:39,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-06-05 15:04:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1214. [2021-06-05 15:04:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.410552349546579) internal successors, (2924), 1213 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2924 transitions. [2021-06-05 15:04:39,022 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2924 transitions. Word has length 30 [2021-06-05 15:04:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:39,022 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 2924 transitions. [2021-06-05 15:04:39,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2924 transitions. [2021-06-05 15:04:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:39,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:39,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:39,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 15:04:39,224 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1556478755, now seen corresponding path program 54 times [2021-06-05 15:04:39,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:39,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953285252] [2021-06-05 15:04:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:39,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:39,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953285252] [2021-06-05 15:04:39,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953285252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:39,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698147177] [2021-06-05 15:04:39,429 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:39,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:04:39,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:39,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:39,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:39,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:39,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:39,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:39,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:04:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:39,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698147177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:39,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:39,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:04:39,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093656453] [2021-06-05 15:04:39,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:39,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:39,643 INFO L87 Difference]: Start difference. First operand 1214 states and 2924 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:42,134 INFO L93 Difference]: Finished difference Result 3129 states and 7758 transitions. [2021-06-05 15:04:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:04:42,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:42,137 INFO L225 Difference]: With dead ends: 3129 [2021-06-05 15:04:42,137 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 15:04:42,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 2032.8ms TimeCoverageRelationStatistics Valid=749, Invalid=3283, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:04:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 15:04:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1200. [2021-06-05 15:04:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.403669724770642) internal successors, (2882), 1199 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2882 transitions. [2021-06-05 15:04:42,153 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2882 transitions. Word has length 30 [2021-06-05 15:04:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:42,153 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2882 transitions. [2021-06-05 15:04:42,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2882 transitions. [2021-06-05 15:04:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:42,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:42,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:42,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 15:04:42,355 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:42,355 INFO L82 PathProgramCache]: Analyzing trace with hash -350772181, now seen corresponding path program 55 times [2021-06-05 15:04:42,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:42,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142975227] [2021-06-05 15:04:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:42,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:42,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142975227] [2021-06-05 15:04:42,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142975227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:42,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568669366] [2021-06-05 15:04:42,565 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:42,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:42,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:42,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:42,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:42,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:42,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:04:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:42,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568669366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:42,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:42,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:04:42,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749190406] [2021-06-05 15:04:42,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:42,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:42,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:42,807 INFO L87 Difference]: Start difference. First operand 1200 states and 2882 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:44,421 INFO L93 Difference]: Finished difference Result 2621 states and 6461 transitions. [2021-06-05 15:04:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:04:44,421 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:44,424 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 15:04:44,424 INFO L226 Difference]: Without dead ends: 2611 [2021-06-05 15:04:44,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 966.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:04:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-06-05 15:04:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 1197. [2021-06-05 15:04:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 15:04:44,439 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 15:04:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:44,439 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 15:04:44,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 15:04:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:44,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:44,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:44,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 15:04:44,640 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:44,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:44,640 INFO L82 PathProgramCache]: Analyzing trace with hash 740706071, now seen corresponding path program 79 times [2021-06-05 15:04:44,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:44,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148022881] [2021-06-05 15:04:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:44,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148022881] [2021-06-05 15:04:44,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148022881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879238684] [2021-06-05 15:04:44,869 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:44,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:44,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:45,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:04:45,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:45,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:45,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:45,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:04:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:45,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879238684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:45,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:45,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:04:45,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121201481] [2021-06-05 15:04:45,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:45,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:45,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:45,067 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-06-05 15:04:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:46,425 INFO L93 Difference]: Finished difference Result 2638 states and 6419 transitions. [2021-06-05 15:04:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:04:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 30 [2021-06-05 15:04:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:46,428 INFO L225 Difference]: With dead ends: 2638 [2021-06-05 15:04:46,428 INFO L226 Difference]: Without dead ends: 2613 [2021-06-05 15:04:46,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1028.2ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:04:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-06-05 15:04:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1215. [2021-06-05 15:04:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.404448105436573) internal successors, (2919), 1214 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2919 transitions. [2021-06-05 15:04:46,444 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2919 transitions. Word has length 30 [2021-06-05 15:04:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:46,444 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 2919 transitions. [2021-06-05 15:04:46,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-06-05 15:04:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2919 transitions. [2021-06-05 15:04:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:46,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:46,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:46,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-06-05 15:04:46,645 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:46,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:46,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1516477495, now seen corresponding path program 80 times [2021-06-05 15:04:46,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:46,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372436758] [2021-06-05 15:04:46,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:46,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:46,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372436758] [2021-06-05 15:04:46,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372436758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:46,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991873524] [2021-06-05 15:04:46,871 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:46,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:46,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:46,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:46,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:47,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:04:47,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:47,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:47,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:47,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:04:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:47,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991873524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:47,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:47,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:04:47,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899129989] [2021-06-05 15:04:47,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:47,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:47,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:47,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:47,064 INFO L87 Difference]: Start difference. First operand 1215 states and 2919 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:48,634 INFO L93 Difference]: Finished difference Result 3126 states and 7693 transitions. [2021-06-05 15:04:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:04:48,635 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:48,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:48,637 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 15:04:48,637 INFO L226 Difference]: Without dead ends: 3113 [2021-06-05 15:04:48,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1264.4ms TimeCoverageRelationStatistics Valid=457, Invalid=2093, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:04:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2021-06-05 15:04:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 1231. [2021-06-05 15:04:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.4073170731707316) internal successors, (2961), 1230 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2961 transitions. [2021-06-05 15:04:48,652 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2961 transitions. Word has length 30 [2021-06-05 15:04:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:48,652 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 2961 transitions. [2021-06-05 15:04:48,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2961 transitions. [2021-06-05 15:04:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:48,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:48,653 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:48,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 15:04:48,854 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2113286633, now seen corresponding path program 81 times [2021-06-05 15:04:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:48,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345003731] [2021-06-05 15:04:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:49,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:49,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345003731] [2021-06-05 15:04:49,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345003731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016860736] [2021-06-05 15:04:49,069 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:49,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:04:49,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:49,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:49,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:49,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:04:49,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:49,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:49,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:49,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 15:04:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:49,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016860736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:49,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 15:04:49,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564470602] [2021-06-05 15:04:49,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:04:49,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:49,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:04:49,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:49,248 INFO L87 Difference]: Start difference. First operand 1231 states and 2961 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:50,588 INFO L93 Difference]: Finished difference Result 2831 states and 6978 transitions. [2021-06-05 15:04:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:04:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:50,590 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 15:04:50,591 INFO L226 Difference]: Without dead ends: 2814 [2021-06-05 15:04:50,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1107.4ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:04:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-06-05 15:04:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 1219. [2021-06-05 15:04:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 2.4039408866995076) internal successors, (2928), 1218 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 2928 transitions. [2021-06-05 15:04:50,605 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 2928 transitions. Word has length 30 [2021-06-05 15:04:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:50,606 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 2928 transitions. [2021-06-05 15:04:50,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 2928 transitions. [2021-06-05 15:04:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:50,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:50,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:50,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 15:04:50,807 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:50,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:50,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1115033323, now seen corresponding path program 82 times [2021-06-05 15:04:50,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:50,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557758822] [2021-06-05 15:04:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:51,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:51,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557758822] [2021-06-05 15:04:51,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557758822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:51,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781059433] [2021-06-05 15:04:51,028 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:51,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:51,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:51,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:51,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:51,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:04:51,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:51,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:51,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:51,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:04:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:51,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781059433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:51,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:51,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:04:51,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968339531] [2021-06-05 15:04:51,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:51,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:51,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:51,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:51,230 INFO L87 Difference]: Start difference. First operand 1219 states and 2928 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:52,703 INFO L93 Difference]: Finished difference Result 2544 states and 6196 transitions. [2021-06-05 15:04:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:04:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:52,705 INFO L225 Difference]: With dead ends: 2544 [2021-06-05 15:04:52,706 INFO L226 Difference]: Without dead ends: 2525 [2021-06-05 15:04:52,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 972.5ms TimeCoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:04:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-06-05 15:04:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1204. [2021-06-05 15:04:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 2.4064837905236907) internal successors, (2895), 1203 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2895 transitions. [2021-06-05 15:04:52,719 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2895 transitions. Word has length 30 [2021-06-05 15:04:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:52,719 INFO L482 AbstractCegarLoop]: Abstraction has 1204 states and 2895 transitions. [2021-06-05 15:04:52,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2895 transitions. [2021-06-05 15:04:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:52,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:52,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:52,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 15:04:52,921 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash -337896761, now seen corresponding path program 83 times [2021-06-05 15:04:52,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:52,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972693696] [2021-06-05 15:04:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:53,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:53,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972693696] [2021-06-05 15:04:53,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972693696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:53,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18010166] [2021-06-05 15:04:53,130 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:53,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:04:53,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:53,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:53,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:53,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:04:53,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:53,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:53,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:53,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 15:04:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:53,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18010166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:53,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:53,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 15:04:53,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827469470] [2021-06-05 15:04:53,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:53,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:53,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:53,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:53,331 INFO L87 Difference]: Start difference. First operand 1204 states and 2895 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-06-05 15:04:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:54,084 INFO L93 Difference]: Finished difference Result 2465 states and 6020 transitions. [2021-06-05 15:04:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:04:54,084 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 30 [2021-06-05 15:04:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:54,087 INFO L225 Difference]: With dead ends: 2465 [2021-06-05 15:04:54,087 INFO L226 Difference]: Without dead ends: 2456 [2021-06-05 15:04:54,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 651.1ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:04:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-06-05 15:04:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1206. [2021-06-05 15:04:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 2.404979253112033) internal successors, (2898), 1205 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2898 transitions. [2021-06-05 15:04:54,105 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2898 transitions. Word has length 30 [2021-06-05 15:04:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:54,105 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 2898 transitions. [2021-06-05 15:04:54,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-06-05 15:04:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2898 transitions. [2021-06-05 15:04:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:54,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:54,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:54,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-05 15:04:54,307 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash 711613029, now seen corresponding path program 56 times [2021-06-05 15:04:54,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:54,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836681850] [2021-06-05 15:04:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:54,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:54,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836681850] [2021-06-05 15:04:54,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836681850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:54,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244929609] [2021-06-05 15:04:54,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:54,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:54,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:54,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:54,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:54,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:54,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:54,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:54,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:54,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:04:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:54,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244929609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:54,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:54,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:04:54,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311819087] [2021-06-05 15:04:54,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:54,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:54,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:54,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:54,767 INFO L87 Difference]: Start difference. First operand 1206 states and 2898 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:56,604 INFO L93 Difference]: Finished difference Result 3034 states and 7478 transitions. [2021-06-05 15:04:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:04:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:56,606 INFO L225 Difference]: With dead ends: 3034 [2021-06-05 15:04:56,606 INFO L226 Difference]: Without dead ends: 3019 [2021-06-05 15:04:56,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1526.5ms TimeCoverageRelationStatistics Valid=596, Invalid=2944, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:04:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-06-05 15:04:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 1224. [2021-06-05 15:04:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 2.4080130825838104) internal successors, (2945), 1223 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2945 transitions. [2021-06-05 15:04:56,621 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2945 transitions. Word has length 30 [2021-06-05 15:04:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:56,621 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2945 transitions. [2021-06-05 15:04:56,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2945 transitions. [2021-06-05 15:04:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:56,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:56,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:56,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:56,823 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:56,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1376816197, now seen corresponding path program 57 times [2021-06-05 15:04:56,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:56,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236127740] [2021-06-05 15:04:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:57,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:57,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236127740] [2021-06-05 15:04:57,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236127740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:57,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486644506] [2021-06-05 15:04:57,040 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:57,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:04:57,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:57,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:04:57,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:57,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:57,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:57,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2021-06-05 15:04:57,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:57,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:57,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:57,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:30 [2021-06-05 15:04:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:57,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486644506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:57,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:57,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2021-06-05 15:04:57,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621382534] [2021-06-05 15:04:57,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:04:57,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:57,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:04:57,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:04:57,424 INFO L87 Difference]: Start difference. First operand 1224 states and 2945 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:59,199 INFO L93 Difference]: Finished difference Result 2616 states and 6442 transitions. [2021-06-05 15:04:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:04:59,200 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:59,202 INFO L225 Difference]: With dead ends: 2616 [2021-06-05 15:04:59,202 INFO L226 Difference]: Without dead ends: 2598 [2021-06-05 15:04:59,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1327.7ms TimeCoverageRelationStatistics Valid=404, Invalid=2566, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:04:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-06-05 15:04:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1209. [2021-06-05 15:04:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.4048013245033113) internal successors, (2905), 1208 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2905 transitions. [2021-06-05 15:04:59,218 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2905 transitions. Word has length 30 [2021-06-05 15:04:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:59,218 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 2905 transitions. [2021-06-05 15:04:59,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2905 transitions. [2021-06-05 15:04:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:59,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:59,219 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:59,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 15:04:59,420 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:59,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1799145735, now seen corresponding path program 58 times [2021-06-05 15:04:59,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:59,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979467508] [2021-06-05 15:04:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:59,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:59,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979467508] [2021-06-05 15:04:59,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979467508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:59,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554526318] [2021-06-05 15:04:59,658 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:04:59,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:59,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:59,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:59,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:59,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:59,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:59,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:59,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:59,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:04:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:59,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554526318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:59,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:59,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:04:59,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99457275] [2021-06-05 15:04:59,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:59,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:59,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:59,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:59,897 INFO L87 Difference]: Start difference. First operand 1209 states and 2905 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:01,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:01,063 INFO L93 Difference]: Finished difference Result 2695 states and 6685 transitions. [2021-06-05 15:05:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:05:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:01,066 INFO L225 Difference]: With dead ends: 2695 [2021-06-05 15:05:01,066 INFO L226 Difference]: Without dead ends: 2682 [2021-06-05 15:05:01,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 969.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:05:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-05 15:05:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1221. [2021-06-05 15:05:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.4057377049180326) internal successors, (2935), 1220 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2935 transitions. [2021-06-05 15:05:01,080 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2935 transitions. Word has length 30 [2021-06-05 15:05:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:01,080 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 2935 transitions. [2021-06-05 15:05:01,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2935 transitions. [2021-06-05 15:05:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:01,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:01,081 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:01,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:01,285 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash -739420511, now seen corresponding path program 59 times [2021-06-05 15:05:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:01,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364996496] [2021-06-05 15:05:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:01,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:01,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364996496] [2021-06-05 15:05:01,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364996496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:01,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363909893] [2021-06-05 15:05:01,491 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:01,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:05:01,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:01,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:01,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:01,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:01,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:01,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:01,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:05:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:01,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363909893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:01,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:01,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:05:01,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202411390] [2021-06-05 15:05:01,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:01,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:01,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:01,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:01,702 INFO L87 Difference]: Start difference. First operand 1221 states and 2935 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:02,874 INFO L93 Difference]: Finished difference Result 2617 states and 6463 transitions. [2021-06-05 15:05:02,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:05:02,874 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:02,877 INFO L225 Difference]: With dead ends: 2617 [2021-06-05 15:05:02,877 INFO L226 Difference]: Without dead ends: 2600 [2021-06-05 15:05:02,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 943.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:05:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-06-05 15:05:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1212. [2021-06-05 15:05:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.4046242774566475) internal successors, (2912), 1211 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2912 transitions. [2021-06-05 15:05:02,891 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2912 transitions. Word has length 30 [2021-06-05 15:05:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:02,891 INFO L482 AbstractCegarLoop]: Abstraction has 1212 states and 2912 transitions. [2021-06-05 15:05:02,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2912 transitions. [2021-06-05 15:05:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:02,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:02,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:03,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 15:05:03,092 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:03,093 INFO L82 PathProgramCache]: Analyzing trace with hash -203976303, now seen corresponding path program 60 times [2021-06-05 15:05:03,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:03,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164057766] [2021-06-05 15:05:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:03,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:03,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164057766] [2021-06-05 15:05:03,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164057766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:03,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751407038] [2021-06-05 15:05:03,309 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:03,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:05:03,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:03,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:03,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:03,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:03,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:03,682 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:03,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:03,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:03,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:03,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:05:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:03,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751407038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:03,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:03,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:05:03,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140882832] [2021-06-05 15:05:03,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:05:03,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:05:03,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:05:03,719 INFO L87 Difference]: Start difference. First operand 1212 states and 2912 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:05,132 INFO L93 Difference]: Finished difference Result 2523 states and 6213 transitions. [2021-06-05 15:05:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:05:05,132 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:05,135 INFO L225 Difference]: With dead ends: 2523 [2021-06-05 15:05:05,135 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 15:05:05,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:05:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 15:05:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1207. [2021-06-05 15:05:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.4046434494195688) internal successors, (2900), 1206 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2900 transitions. [2021-06-05 15:05:05,149 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2900 transitions. Word has length 30 [2021-06-05 15:05:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:05,149 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2900 transitions. [2021-06-05 15:05:05,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2900 transitions. [2021-06-05 15:05:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:05,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:05,150 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:05,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:05,351 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:05,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2005225401, now seen corresponding path program 61 times [2021-06-05 15:05:05,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:05,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893868588] [2021-06-05 15:05:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:05,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:05,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893868588] [2021-06-05 15:05:05,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893868588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:05,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920804841] [2021-06-05 15:05:05,595 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:05,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:05,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:05:05,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:05,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:05,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:05,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 15:05:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:05,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920804841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:05,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:05,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:05,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111102029] [2021-06-05 15:05:05,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:05,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:05,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:05,825 INFO L87 Difference]: Start difference. First operand 1207 states and 2900 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:07,489 INFO L93 Difference]: Finished difference Result 2467 states and 6031 transitions. [2021-06-05 15:05:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:05:07,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:07,492 INFO L225 Difference]: With dead ends: 2467 [2021-06-05 15:05:07,492 INFO L226 Difference]: Without dead ends: 2449 [2021-06-05 15:05:07,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1092.7ms TimeCoverageRelationStatistics Valid=340, Invalid=1822, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:05:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-05 15:05:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1197. [2021-06-05 15:05:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 15:05:07,506 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 15:05:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:07,506 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 15:05:07,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 15:05:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:07,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:07,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:07,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 15:05:07,708 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:07,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1032671535, now seen corresponding path program 62 times [2021-06-05 15:05:07,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:07,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85886292] [2021-06-05 15:05:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:07,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:07,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85886292] [2021-06-05 15:05:07,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85886292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:07,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863589693] [2021-06-05 15:05:07,939 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:07,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:07,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:08,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:05:08,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:08,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:08,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:08,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 15:05:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:08,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863589693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:08,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:08,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:08,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10007491] [2021-06-05 15:05:08,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:08,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:08,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:08,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:08,196 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:09,726 INFO L93 Difference]: Finished difference Result 2588 states and 6315 transitions. [2021-06-05 15:05:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:05:09,726 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:09,729 INFO L225 Difference]: With dead ends: 2588 [2021-06-05 15:05:09,729 INFO L226 Difference]: Without dead ends: 2571 [2021-06-05 15:05:09,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1094.3ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:05:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-05 15:05:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1215. [2021-06-05 15:05:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.4069192751235584) internal successors, (2922), 1214 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2922 transitions. [2021-06-05 15:05:09,744 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2922 transitions. Word has length 30 [2021-06-05 15:05:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:09,744 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 2922 transitions. [2021-06-05 15:05:09,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2922 transitions. [2021-06-05 15:05:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:09,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:09,746 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:09,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 15:05:09,957 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1306343273, now seen corresponding path program 63 times [2021-06-05 15:05:09,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:09,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488385431] [2021-06-05 15:05:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:10,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488385431] [2021-06-05 15:05:10,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488385431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:10,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242986653] [2021-06-05 15:05:10,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:10,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:05:10,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:10,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:10,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:10,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:10,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:10,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:10,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:10,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:05:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:10,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242986653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:10,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:10,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:10,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127043889] [2021-06-05 15:05:10,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:10,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:10,375 INFO L87 Difference]: Start difference. First operand 1215 states and 2922 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:11,718 INFO L93 Difference]: Finished difference Result 3020 states and 7433 transitions. [2021-06-05 15:05:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:05:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:11,721 INFO L225 Difference]: With dead ends: 3020 [2021-06-05 15:05:11,721 INFO L226 Difference]: Without dead ends: 3007 [2021-06-05 15:05:11,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1197.1ms TimeCoverageRelationStatistics Valid=490, Invalid=2266, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:05:11,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2021-06-05 15:05:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 1226. [2021-06-05 15:05:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.409795918367347) internal successors, (2952), 1225 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2952 transitions. [2021-06-05 15:05:11,736 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2952 transitions. Word has length 30 [2021-06-05 15:05:11,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:11,736 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 2952 transitions. [2021-06-05 15:05:11,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2952 transitions. [2021-06-05 15:05:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:11,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:11,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:11,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:11,938 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1971546441, now seen corresponding path program 64 times [2021-06-05 15:05:11,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:11,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567647758] [2021-06-05 15:05:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:12,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567647758] [2021-06-05 15:05:12,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567647758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139997597] [2021-06-05 15:05:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:12,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:12,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:12,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:12,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:12,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:05:12,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:12,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:12,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:12,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:05:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139997597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:12,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:05:12,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012141621] [2021-06-05 15:05:12,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:12,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:12,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:12,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:12,373 INFO L87 Difference]: Start difference. First operand 1226 states and 2952 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:13,812 INFO L93 Difference]: Finished difference Result 2743 states and 6755 transitions. [2021-06-05 15:05:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:05:13,812 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:13,815 INFO L225 Difference]: With dead ends: 2743 [2021-06-05 15:05:13,815 INFO L226 Difference]: Without dead ends: 2725 [2021-06-05 15:05:13,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1052.5ms TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:05:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-05 15:05:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1200. [2021-06-05 15:05:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.403669724770642) internal successors, (2882), 1199 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2882 transitions. [2021-06-05 15:05:13,829 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2882 transitions. Word has length 30 [2021-06-05 15:05:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:13,829 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2882 transitions. [2021-06-05 15:05:13,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2882 transitions. [2021-06-05 15:05:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:13,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:13,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:14,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:14,034 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:14,034 INFO L82 PathProgramCache]: Analyzing trace with hash 720783231, now seen corresponding path program 65 times [2021-06-05 15:05:14,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:14,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007364177] [2021-06-05 15:05:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:14,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:14,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007364177] [2021-06-05 15:05:14,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007364177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:14,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313369208] [2021-06-05 15:05:14,249 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:14,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:05:14,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:14,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:14,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:14,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:05:14,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:14,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:14,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:14,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 15:05:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:14,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313369208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:14,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:14,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:14,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35229470] [2021-06-05 15:05:14,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:14,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:14,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:14,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:14,483 INFO L87 Difference]: Start difference. First operand 1200 states and 2882 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:15,455 INFO L93 Difference]: Finished difference Result 2411 states and 5894 transitions. [2021-06-05 15:05:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:05:15,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:15,457 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 15:05:15,457 INFO L226 Difference]: Without dead ends: 2402 [2021-06-05 15:05:15,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 722.2ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:05:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-06-05 15:05:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1197. [2021-06-05 15:05:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 15:05:15,471 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 15:05:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:15,471 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 15:05:15,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 15:05:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:15,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:15,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:15,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-06-05 15:05:15,673 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1419800111, now seen corresponding path program 84 times [2021-06-05 15:05:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:15,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655322855] [2021-06-05 15:05:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:15,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:15,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655322855] [2021-06-05 15:05:15,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655322855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:15,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419797672] [2021-06-05 15:05:15,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:15,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:05:15,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:15,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:16,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:16,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:16,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:16,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:16,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:16,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419797672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:16,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:16,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:16,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162392561] [2021-06-05 15:05:16,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:16,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:16,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:16,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:16,136 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:17,245 INFO L93 Difference]: Finished difference Result 2660 states and 6507 transitions. [2021-06-05 15:05:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:05:17,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:17,248 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 15:05:17,248 INFO L226 Difference]: Without dead ends: 2651 [2021-06-05 15:05:17,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 678.4ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:05:17,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-05 15:05:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 1197. [2021-06-05 15:05:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 15:05:17,263 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 15:05:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:17,263 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 15:05:17,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 15:05:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:17,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:17,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:17,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:17,464 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1811421553, now seen corresponding path program 85 times [2021-06-05 15:05:17,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:17,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637972553] [2021-06-05 15:05:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:17,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:17,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637972553] [2021-06-05 15:05:17,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637972553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:17,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801222228] [2021-06-05 15:05:17,665 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:17,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:17,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:17,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:17,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:17,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:17,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:17,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:17,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801222228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:17,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:17,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:17,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32802202] [2021-06-05 15:05:17,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:17,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:17,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:17,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:17,908 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:18,742 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-05 15:05:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:19,282 INFO L93 Difference]: Finished difference Result 2800 states and 6826 transitions. [2021-06-05 15:05:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:05:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:19,285 INFO L225 Difference]: With dead ends: 2800 [2021-06-05 15:05:19,285 INFO L226 Difference]: Without dead ends: 2775 [2021-06-05 15:05:19,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 870.5ms TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:05:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2021-06-05 15:05:19,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1215. [2021-06-05 15:05:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.404448105436573) internal successors, (2919), 1214 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2919 transitions. [2021-06-05 15:05:19,300 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2919 transitions. Word has length 30 [2021-06-05 15:05:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:19,300 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 2919 transitions. [2021-06-05 15:05:19,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2919 transitions. [2021-06-05 15:05:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:19,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:19,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:19,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-05 15:05:19,502 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:19,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1934528523, now seen corresponding path program 86 times [2021-06-05 15:05:19,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:19,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574412776] [2021-06-05 15:05:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:19,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:19,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574412776] [2021-06-05 15:05:19,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574412776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:19,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599867298] [2021-06-05 15:05:19,726 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:19,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:19,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:19,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:19,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:05:19,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:19,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:19,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:19,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:05:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:19,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599867298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:19,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:19,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:19,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439596982] [2021-06-05 15:05:19,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:19,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:19,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:19,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:19,956 INFO L87 Difference]: Start difference. First operand 1215 states and 2919 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:21,615 INFO L93 Difference]: Finished difference Result 3292 states and 8108 transitions. [2021-06-05 15:05:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:05:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:21,619 INFO L225 Difference]: With dead ends: 3292 [2021-06-05 15:05:21,619 INFO L226 Difference]: Without dead ends: 3279 [2021-06-05 15:05:21,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1135.1ms TimeCoverageRelationStatistics Valid=433, Invalid=1919, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:05:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-05 15:05:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1231. [2021-06-05 15:05:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.4073170731707316) internal successors, (2961), 1230 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2961 transitions. [2021-06-05 15:05:21,636 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2961 transitions. Word has length 30 [2021-06-05 15:05:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:21,636 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 2961 transitions. [2021-06-05 15:05:21,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2961 transitions. [2021-06-05 15:05:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:21,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:21,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:21,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:21,845 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:21,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1695235605, now seen corresponding path program 87 times [2021-06-05 15:05:21,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:21,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977431360] [2021-06-05 15:05:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:22,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:22,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977431360] [2021-06-05 15:05:22,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977431360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:22,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148744019] [2021-06-05 15:05:22,046 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:22,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:05:22,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:22,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:22,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:22,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:22,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:22,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:22,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:22,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:05:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:22,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148744019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:22,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:22,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:05:22,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123161267] [2021-06-05 15:05:22,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:22,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:22,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:22,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:22,302 INFO L87 Difference]: Start difference. First operand 1231 states and 2961 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:23,502 INFO L93 Difference]: Finished difference Result 2827 states and 6950 transitions. [2021-06-05 15:05:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:05:23,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:23,513 INFO L225 Difference]: With dead ends: 2827 [2021-06-05 15:05:23,514 INFO L226 Difference]: Without dead ends: 2810 [2021-06-05 15:05:23,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 868.8ms TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:05:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-06-05 15:05:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1219. [2021-06-05 15:05:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 2.4039408866995076) internal successors, (2928), 1218 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 2928 transitions. [2021-06-05 15:05:23,528 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 2928 transitions. Word has length 30 [2021-06-05 15:05:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:23,528 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 2928 transitions. [2021-06-05 15:05:23,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 2928 transitions. [2021-06-05 15:05:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:23,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:23,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:23,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 15:05:23,730 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash -696982295, now seen corresponding path program 88 times [2021-06-05 15:05:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:23,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824575177] [2021-06-05 15:05:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:23,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:23,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824575177] [2021-06-05 15:05:23,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824575177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:23,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001934340] [2021-06-05 15:05:23,926 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:23,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:23,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:23,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:23,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:24,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:24,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:24,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:24,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:24,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:24,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001934340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:24,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:24,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:24,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763242333] [2021-06-05 15:05:24,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:24,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:24,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:24,160 INFO L87 Difference]: Start difference. First operand 1219 states and 2928 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:25,306 INFO L93 Difference]: Finished difference Result 2720 states and 6635 transitions. [2021-06-05 15:05:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:05:25,307 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:25,309 INFO L225 Difference]: With dead ends: 2720 [2021-06-05 15:05:25,310 INFO L226 Difference]: Without dead ends: 2701 [2021-06-05 15:05:25,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 759.6ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:05:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-06-05 15:05:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1200. [2021-06-05 15:05:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.403669724770642) internal successors, (2882), 1199 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2882 transitions. [2021-06-05 15:05:25,323 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2882 transitions. Word has length 30 [2021-06-05 15:05:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:25,323 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2882 transitions. [2021-06-05 15:05:25,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2882 transitions. [2021-06-05 15:05:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:25,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:25,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:25,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 15:05:25,525 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:25,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1677306459, now seen corresponding path program 89 times [2021-06-05 15:05:25,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:25,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540688996] [2021-06-05 15:05:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:25,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:25,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540688996] [2021-06-05 15:05:25,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540688996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:25,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42160214] [2021-06-05 15:05:25,735 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:25,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:05:25,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:25,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:25,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:25,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:25,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:25,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:25,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:25,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:25,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42160214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:25,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:25,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:25,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834684145] [2021-06-05 15:05:25,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:25,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:25,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:25,964 INFO L87 Difference]: Start difference. First operand 1200 states and 2882 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:27,042 INFO L93 Difference]: Finished difference Result 2628 states and 6430 transitions. [2021-06-05 15:05:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:05:27,042 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:27,044 INFO L225 Difference]: With dead ends: 2628 [2021-06-05 15:05:27,044 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 15:05:27,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 656.3ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:05:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 15:05:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 1197. [2021-06-05 15:05:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 15:05:27,059 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 15:05:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:27,059 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 15:05:27,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 15:05:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:27,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:27,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:27,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2021-06-05 15:05:27,276 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:27,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1600223437, now seen corresponding path program 90 times [2021-06-05 15:05:27,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:27,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565057639] [2021-06-05 15:05:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:27,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:27,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565057639] [2021-06-05 15:05:27,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565057639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:27,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943715838] [2021-06-05 15:05:27,498 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:27,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:05:27,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:27,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:05:27,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:27,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:27,833 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 20 treesize of output 28 [2021-06-05 15:05:27,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:27,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:27,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:27,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:38 [2021-06-05 15:05:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:27,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943715838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:27,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:27,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 15:05:27,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011854889] [2021-06-05 15:05:27,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:05:27,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:27,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:05:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:27,964 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:30,639 INFO L93 Difference]: Finished difference Result 2855 states and 6979 transitions. [2021-06-05 15:05:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:05:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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 30 [2021-06-05 15:05:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:30,642 INFO L225 Difference]: With dead ends: 2855 [2021-06-05 15:05:30,642 INFO L226 Difference]: Without dead ends: 2834 [2021-06-05 15:05:30,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 2102.2ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:05:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-05 15:05:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1214. [2021-06-05 15:05:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.4047815333882934) internal successors, (2917), 1213 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2917 transitions. [2021-06-05 15:05:30,657 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2917 transitions. Word has length 30 [2021-06-05 15:05:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:30,657 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 2917 transitions. [2021-06-05 15:05:30,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2917 transitions. [2021-06-05 15:05:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:30,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:30,658 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:30,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 15:05:30,876 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -824452013, now seen corresponding path program 91 times [2021-06-05 15:05:30,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:30,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826346219] [2021-06-05 15:05:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:31,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:31,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826346219] [2021-06-05 15:05:31,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826346219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:31,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631985191] [2021-06-05 15:05:31,117 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:31,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:31,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:31,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:31,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:31,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:31,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:31,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:05:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:31,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631985191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:31,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:31,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:31,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971512008] [2021-06-05 15:05:31,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:31,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:31,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:31,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:31,372 INFO L87 Difference]: Start difference. First operand 1214 states and 2917 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:33,502 INFO L93 Difference]: Finished difference Result 3275 states and 8059 transitions. [2021-06-05 15:05:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:05:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:33,505 INFO L225 Difference]: With dead ends: 3275 [2021-06-05 15:05:33,505 INFO L226 Difference]: Without dead ends: 3260 [2021-06-05 15:05:33,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1663.3ms TimeCoverageRelationStatistics Valid=613, Invalid=3047, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:05:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2021-06-05 15:05:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 1247. [2021-06-05 15:05:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 2.408507223113965) internal successors, (3001), 1246 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 3001 transitions. [2021-06-05 15:05:33,521 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 3001 transitions. Word has length 30 [2021-06-05 15:05:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:33,521 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 3001 transitions. [2021-06-05 15:05:33,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 3001 transitions. [2021-06-05 15:05:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:33,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:33,522 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:33,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:33,723 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:33,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:33,723 INFO L82 PathProgramCache]: Analyzing trace with hash -159248845, now seen corresponding path program 92 times [2021-06-05 15:05:33,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:33,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978350539] [2021-06-05 15:05:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:33,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:33,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978350539] [2021-06-05 15:05:33,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978350539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:33,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159954233] [2021-06-05 15:05:33,950 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:33,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:33,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:33,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:34,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:34,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:34,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:34,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:34,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:05:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:34,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159954233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:34,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:34,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:05:34,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695138339] [2021-06-05 15:05:34,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:34,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:34,166 INFO L87 Difference]: Start difference. First operand 1247 states and 3001 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:35,379 INFO L93 Difference]: Finished difference Result 2763 states and 6781 transitions. [2021-06-05 15:05:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:05:35,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:35,382 INFO L225 Difference]: With dead ends: 2763 [2021-06-05 15:05:35,382 INFO L226 Difference]: Without dead ends: 2746 [2021-06-05 15:05:35,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1003.7ms TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:05:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-05 15:05:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1238. [2021-06-05 15:05:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.406628940986257) internal successors, (2977), 1237 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2977 transitions. [2021-06-05 15:05:35,397 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2977 transitions. Word has length 30 [2021-06-05 15:05:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:35,398 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 2977 transitions. [2021-06-05 15:05:35,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2977 transitions. [2021-06-05 15:05:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:35,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:35,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:35,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 15:05:35,599 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:35,599 INFO L82 PathProgramCache]: Analyzing trace with hash 839004465, now seen corresponding path program 93 times [2021-06-05 15:05:35,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:35,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693777173] [2021-06-05 15:05:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:35,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:35,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693777173] [2021-06-05 15:05:35,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693777173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:35,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796855307] [2021-06-05 15:05:35,828 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:35,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:05:35,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:35,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:35,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:36,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:36,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:36,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:36,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:36,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:36,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796855307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:36,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:36,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:05:36,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755771218] [2021-06-05 15:05:36,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:36,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:36,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:36,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:36,073 INFO L87 Difference]: Start difference. First operand 1238 states and 2977 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:37,772 INFO L93 Difference]: Finished difference Result 2624 states and 6425 transitions. [2021-06-05 15:05:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:05:37,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:37,774 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 15:05:37,774 INFO L226 Difference]: Without dead ends: 2605 [2021-06-05 15:05:37,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1245.5ms TimeCoverageRelationStatistics Valid=392, Invalid=1770, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:05:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-06-05 15:05:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1226. [2021-06-05 15:05:37,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.4081632653061225) internal successors, (2950), 1225 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2950 transitions. [2021-06-05 15:05:37,788 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2950 transitions. Word has length 30 [2021-06-05 15:05:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:37,788 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 2950 transitions. [2021-06-05 15:05:37,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2950 transitions. [2021-06-05 15:05:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:37,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:37,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:37,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 15:05:37,998 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:37,998 INFO L82 PathProgramCache]: Analyzing trace with hash 448898545, now seen corresponding path program 94 times [2021-06-05 15:05:37,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:37,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345645804] [2021-06-05 15:05:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:38,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:38,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345645804] [2021-06-05 15:05:38,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345645804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:38,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506339058] [2021-06-05 15:05:38,247 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:38,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:38,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:38,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:38,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:38,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:38,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:38,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:38,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:05:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:38,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506339058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:38,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:38,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:05:38,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635345198] [2021-06-05 15:05:38,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:38,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:38,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:38,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:38,471 INFO L87 Difference]: Start difference. First operand 1226 states and 2950 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:40,239 INFO L93 Difference]: Finished difference Result 3344 states and 8301 transitions. [2021-06-05 15:05:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:05:40,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:40,243 INFO L225 Difference]: With dead ends: 3344 [2021-06-05 15:05:40,243 INFO L226 Difference]: Without dead ends: 3331 [2021-06-05 15:05:40,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1421.2ms TimeCoverageRelationStatistics Valid=491, Invalid=2265, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:05:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2021-06-05 15:05:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 1247. [2021-06-05 15:05:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 2.4109149277688604) internal successors, (3004), 1246 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 3004 transitions. [2021-06-05 15:05:40,259 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 3004 transitions. Word has length 30 [2021-06-05 15:05:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:40,259 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 3004 transitions. [2021-06-05 15:05:40,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 3004 transitions. [2021-06-05 15:05:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:40,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:40,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:40,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable532,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:40,464 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:40,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2089667701, now seen corresponding path program 95 times [2021-06-05 15:05:40,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:40,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396014731] [2021-06-05 15:05:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:40,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:40,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396014731] [2021-06-05 15:05:40,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396014731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:40,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695355054] [2021-06-05 15:05:40,697 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:40,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:05:40,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:40,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:40,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:05:40,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:40,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:40,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:40,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:05:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:40,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695355054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:40,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:40,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:05:40,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972460233] [2021-06-05 15:05:40,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:40,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:40,955 INFO L87 Difference]: Start difference. First operand 1247 states and 3004 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:42,745 INFO L93 Difference]: Finished difference Result 2967 states and 7340 transitions. [2021-06-05 15:05:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:05:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:42,749 INFO L225 Difference]: With dead ends: 2967 [2021-06-05 15:05:42,749 INFO L226 Difference]: Without dead ends: 2950 [2021-06-05 15:05:42,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1261.1ms TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:05:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-06-05 15:05:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 1238. [2021-06-05 15:05:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.4098625707356507) internal successors, (2981), 1237 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2981 transitions. [2021-06-05 15:05:42,765 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2981 transitions. Word has length 30 [2021-06-05 15:05:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:42,765 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 2981 transitions. [2021-06-05 15:05:42,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2981 transitions. [2021-06-05 15:05:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:42,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:42,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:42,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 15:05:42,967 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash -560713633, now seen corresponding path program 96 times [2021-06-05 15:05:42,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:42,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903071893] [2021-06-05 15:05:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:43,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:43,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903071893] [2021-06-05 15:05:43,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903071893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:43,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167970567] [2021-06-05 15:05:43,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:43,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:05:43,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:43,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:43,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:43,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:05:43,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:43,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:43,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:43,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 15:05:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:43,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167970567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:43,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:43,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:43,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482099850] [2021-06-05 15:05:43,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:43,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:43,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:43,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:43,438 INFO L87 Difference]: Start difference. First operand 1238 states and 2981 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:44,827 INFO L93 Difference]: Finished difference Result 2622 states and 6462 transitions. [2021-06-05 15:05:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:05:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:44,829 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 15:05:44,830 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 15:05:44,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 974.0ms TimeCoverageRelationStatistics Valid=270, Invalid=1622, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:05:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 15:05:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 1229. [2021-06-05 15:05:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.4079804560260585) internal successors, (2957), 1228 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2957 transitions. [2021-06-05 15:05:44,844 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2957 transitions. Word has length 30 [2021-06-05 15:05:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:44,844 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 2957 transitions. [2021-06-05 15:05:44,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2957 transitions. [2021-06-05 15:05:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:44,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:44,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:45,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:45,045 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:45,046 INFO L82 PathProgramCache]: Analyzing trace with hash 513532051, now seen corresponding path program 97 times [2021-06-05 15:05:45,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:45,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574892456] [2021-06-05 15:05:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:45,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:45,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574892456] [2021-06-05 15:05:45,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574892456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:45,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491646679] [2021-06-05 15:05:45,285 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:45,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:55,094 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 15:05:55,094 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 64 [2021-06-05 15:05:55,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:55,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:55,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:55,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:11 [2021-06-05 15:05:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:55,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491646679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:55,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:55,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:05:55,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620458265] [2021-06-05 15:05:55,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:55,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:55,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:55,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=369, Unknown=3, NotChecked=0, Total=462 [2021-06-05 15:05:55,146 INFO L87 Difference]: Start difference. First operand 1229 states and 2957 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:36,458 INFO L93 Difference]: Finished difference Result 2889 states and 7139 transitions. [2021-06-05 15:07:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:07:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:36,480 INFO L225 Difference]: With dead ends: 2889 [2021-06-05 15:07:36,480 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 15:07:36,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 15745.5ms TimeCoverageRelationStatistics Valid=326, Invalid=1562, Unknown=4, NotChecked=0, Total=1892 [2021-06-05 15:07:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 15:07:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1241. [2021-06-05 15:07:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.4088709677419353) internal successors, (2987), 1240 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2987 transitions. [2021-06-05 15:07:36,495 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2987 transitions. Word has length 30 [2021-06-05 15:07:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:36,496 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 2987 transitions. [2021-06-05 15:07:36,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2987 transitions. [2021-06-05 15:07:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:36,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:36,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:36,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 15:07:36,698 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2025034195, now seen corresponding path program 98 times [2021-06-05 15:07:36,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:36,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616864040] [2021-06-05 15:07:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:37,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:37,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616864040] [2021-06-05 15:07:37,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616864040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:37,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960449958] [2021-06-05 15:07:37,106 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:37,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:37,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:37,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:37,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:37,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:37,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:37,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:37,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:07:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:37,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960449958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:37,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:37,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:07:37,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310055563] [2021-06-05 15:07:37,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:37,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:37,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:37,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:37,419 INFO L87 Difference]: Start difference. First operand 1241 states and 2987 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:39,380 INFO L93 Difference]: Finished difference Result 2643 states and 6495 transitions. [2021-06-05 15:07:39,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:07:39,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:39,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:39,383 INFO L225 Difference]: With dead ends: 2643 [2021-06-05 15:07:39,384 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 15:07:39,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1574.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:07:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 15:07:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1232. [2021-06-05 15:07:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.4069861900893583) internal successors, (2963), 1231 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 2963 transitions. [2021-06-05 15:07:39,399 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 2963 transitions. Word has length 30 [2021-06-05 15:07:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:39,399 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 2963 transitions. [2021-06-05 15:07:39,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 2963 transitions. [2021-06-05 15:07:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:39,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:39,400 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:39,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 15:07:39,600 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1911058279, now seen corresponding path program 99 times [2021-06-05 15:07:39,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:39,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770990397] [2021-06-05 15:07:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:39,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:39,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770990397] [2021-06-05 15:07:39,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770990397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:39,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131639945] [2021-06-05 15:07:39,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:39,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:07:39,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:39,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:39,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:40,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:40,400 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 20 treesize of output 36 [2021-06-05 15:07:40,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:40,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:92 [2021-06-05 15:07:40,761 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-06-05 15:07:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:40,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131639945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:40,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 15:07:40,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830115585] [2021-06-05 15:07:40,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:07:40,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:40,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:07:40,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:07:40,807 INFO L87 Difference]: Start difference. First operand 1232 states and 2963 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:41,054 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 15:07:41,639 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 15:07:41,842 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2021-06-05 15:07:42,346 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-06-05 15:07:42,542 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-06-05 15:07:43,233 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-05 15:07:43,595 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-06-05 15:07:43,880 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2021-06-05 15:07:44,435 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 15:07:44,924 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-05 15:07:45,521 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-05 15:07:45,992 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-06-05 15:07:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:46,459 INFO L93 Difference]: Finished difference Result 2745 states and 6698 transitions. [2021-06-05 15:07:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:07:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:46,462 INFO L225 Difference]: With dead ends: 2745 [2021-06-05 15:07:46,462 INFO L226 Difference]: Without dead ends: 2729 [2021-06-05 15:07:46,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 5020.1ms TimeCoverageRelationStatistics Valid=718, Invalid=3838, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:07:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-05 15:07:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 1230. [2021-06-05 15:07:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.406834825061025) internal successors, (2958), 1229 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2958 transitions. [2021-06-05 15:07:46,477 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2958 transitions. Word has length 30 [2021-06-05 15:07:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:46,477 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 2958 transitions. [2021-06-05 15:07:46,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2958 transitions. [2021-06-05 15:07:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:46,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:46,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:46,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 15:07:46,678 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash -873028603, now seen corresponding path program 100 times [2021-06-05 15:07:46,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:46,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443294516] [2021-06-05 15:07:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:47,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:47,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443294516] [2021-06-05 15:07:47,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443294516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:47,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960792838] [2021-06-05 15:07:47,022 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:47,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:47,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:47,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:47,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:47,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:47,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:47,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:47,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:47,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:07:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:47,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960792838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:47,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:47,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:07:47,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788433490] [2021-06-05 15:07:47,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:47,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:47,388 INFO L87 Difference]: Start difference. First operand 1230 states and 2958 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:49,674 INFO L93 Difference]: Finished difference Result 2845 states and 6936 transitions. [2021-06-05 15:07:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:07:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:49,678 INFO L225 Difference]: With dead ends: 2845 [2021-06-05 15:07:49,678 INFO L226 Difference]: Without dead ends: 2820 [2021-06-05 15:07:49,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1757.1ms TimeCoverageRelationStatistics Valid=356, Invalid=1536, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:07:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-05 15:07:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1248. [2021-06-05 15:07:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.4073777064955895) internal successors, (3002), 1247 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3002 transitions. [2021-06-05 15:07:49,693 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3002 transitions. Word has length 30 [2021-06-05 15:07:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:49,693 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 3002 transitions. [2021-06-05 15:07:49,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3002 transitions. [2021-06-05 15:07:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:49,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:49,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:49,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:49,894 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:49,895 INFO L82 PathProgramCache]: Analyzing trace with hash -97257179, now seen corresponding path program 101 times [2021-06-05 15:07:49,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:49,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422065865] [2021-06-05 15:07:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:50,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:50,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422065865] [2021-06-05 15:07:50,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422065865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:50,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361415621] [2021-06-05 15:07:50,217 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:50,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:07:50,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:50,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:50,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:50,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:50,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:50,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:50,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:50,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:07:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:50,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361415621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:50,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:50,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:07:50,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807835200] [2021-06-05 15:07:50,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:50,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:50,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:50,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:50,610 INFO L87 Difference]: Start difference. First operand 1248 states and 3002 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:53,668 INFO L93 Difference]: Finished difference Result 3370 states and 8294 transitions. [2021-06-05 15:07:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:07:53,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:53,672 INFO L225 Difference]: With dead ends: 3370 [2021-06-05 15:07:53,672 INFO L226 Difference]: Without dead ends: 3357 [2021-06-05 15:07:53,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 2143.5ms TimeCoverageRelationStatistics Valid=504, Invalid=2252, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:07:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-06-05 15:07:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 1264. [2021-06-05 15:07:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 2.410134600158353) internal successors, (3044), 1263 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 3044 transitions. [2021-06-05 15:07:53,692 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 3044 transitions. Word has length 30 [2021-06-05 15:07:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:53,692 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 3044 transitions. [2021-06-05 15:07:53,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 3044 transitions. [2021-06-05 15:07:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:53,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:53,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:53,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:53,894 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash 567945989, now seen corresponding path program 102 times [2021-06-05 15:07:53,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:53,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914021208] [2021-06-05 15:07:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:54,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:54,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914021208] [2021-06-05 15:07:54,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914021208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:54,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784851893] [2021-06-05 15:07:54,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:54,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:54,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:54,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:07:54,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:54,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:54,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:54,659 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 20 treesize of output 28 [2021-06-05 15:07:54,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:54,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:54,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:54,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:41 [2021-06-05 15:07:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:54,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784851893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:54,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:54,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 15:07:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526767169] [2021-06-05 15:07:54,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:07:54,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:07:54,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:07:54,886 INFO L87 Difference]: Start difference. First operand 1264 states and 3044 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-06-05 15:07:55,662 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 15:07:56,421 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-06-05 15:07:57,020 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-05 15:07:57,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:57,969 INFO L93 Difference]: Finished difference Result 2831 states and 6958 transitions. [2021-06-05 15:07:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:07:57,970 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:57,973 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 15:07:57,973 INFO L226 Difference]: Without dead ends: 2814 [2021-06-05 15:07:57,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2489.2ms TimeCoverageRelationStatistics Valid=396, Invalid=2054, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:07:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-06-05 15:07:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 1283. [2021-06-05 15:07:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 2.4110764430577225) internal successors, (3091), 1282 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3091 transitions. [2021-06-05 15:07:57,987 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3091 transitions. Word has length 30 [2021-06-05 15:07:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:57,987 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 3091 transitions. [2021-06-05 15:07:57,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-06-05 15:07:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3091 transitions. [2021-06-05 15:07:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:57,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:57,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:58,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:58,189 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:58,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:58,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1566199299, now seen corresponding path program 103 times [2021-06-05 15:07:58,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:58,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97829769] [2021-06-05 15:07:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:58,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:58,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97829769] [2021-06-05 15:07:58,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97829769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:58,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233370156] [2021-06-05 15:07:58,498 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:58,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:58,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:58,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:58,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:58,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:58,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:07:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:58,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233370156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:58,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:58,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:07:58,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138962463] [2021-06-05 15:07:58,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:58,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:58,826 INFO L87 Difference]: Start difference. First operand 1283 states and 3091 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:01,101 INFO L93 Difference]: Finished difference Result 2800 states and 6833 transitions. [2021-06-05 15:08:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:08:01,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:01,104 INFO L225 Difference]: With dead ends: 2800 [2021-06-05 15:08:01,104 INFO L226 Difference]: Without dead ends: 2781 [2021-06-05 15:08:01,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1687.6ms TimeCoverageRelationStatistics Valid=374, Invalid=1606, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:08:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-06-05 15:08:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 1267. [2021-06-05 15:08:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.4091627172195893) internal successors, (3050), 1266 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 3050 transitions. [2021-06-05 15:08:01,119 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 3050 transitions. Word has length 30 [2021-06-05 15:08:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:01,119 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 3050 transitions. [2021-06-05 15:08:01,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 3050 transitions. [2021-06-05 15:08:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:01,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:01,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:01,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-05 15:08:01,320 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:01,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1951631435, now seen corresponding path program 104 times [2021-06-05 15:08:01,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:01,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158900177] [2021-06-05 15:08:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:01,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:01,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158900177] [2021-06-05 15:08:01,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158900177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:01,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470069281] [2021-06-05 15:08:01,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:01,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:01,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:01,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:01,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:01,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:01,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:01,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:01,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:01,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:08:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:01,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470069281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:01,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:01,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:01,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247837926] [2021-06-05 15:08:01,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:01,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:01,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:01,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:01,944 INFO L87 Difference]: Start difference. First operand 1267 states and 3050 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:03,553 INFO L93 Difference]: Finished difference Result 2728 states and 6676 transitions. [2021-06-05 15:08:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:08:03,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:03,557 INFO L225 Difference]: With dead ends: 2728 [2021-06-05 15:08:03,557 INFO L226 Difference]: Without dead ends: 2719 [2021-06-05 15:08:03,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1041.3ms TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:08:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-06-05 15:08:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 1264. [2021-06-05 15:08:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 2.4093428345209817) internal successors, (3043), 1263 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 3043 transitions. [2021-06-05 15:08:03,572 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 3043 transitions. Word has length 30 [2021-06-05 15:08:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:03,572 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 3043 transitions. [2021-06-05 15:08:03,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 3043 transitions. [2021-06-05 15:08:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:03,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:03,578 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:03,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 15:08:03,778 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash -820062243, now seen corresponding path program 66 times [2021-06-05 15:08:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:03,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268082445] [2021-06-05 15:08:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:04,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:04,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268082445] [2021-06-05 15:08:04,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268082445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:04,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116150432] [2021-06-05 15:08:04,067 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:04,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:08:04,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:04,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:04,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:04,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:08:04,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:04,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:04,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:04,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 15:08:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:04,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116150432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:04,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:04,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:04,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655162067] [2021-06-05 15:08:04,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:04,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:04,390 INFO L87 Difference]: Start difference. First operand 1264 states and 3043 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:06,083 INFO L93 Difference]: Finished difference Result 2758 states and 6750 transitions. [2021-06-05 15:08:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:08:06,083 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:06,086 INFO L225 Difference]: With dead ends: 2758 [2021-06-05 15:08:06,086 INFO L226 Difference]: Without dead ends: 2749 [2021-06-05 15:08:06,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1029.2ms TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:08:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-06-05 15:08:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 1299. [2021-06-05 15:08:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.403697996918336) internal successors, (3120), 1298 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3120 transitions. [2021-06-05 15:08:06,103 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3120 transitions. Word has length 30 [2021-06-05 15:08:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:06,103 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3120 transitions. [2021-06-05 15:08:06,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3120 transitions. [2021-06-05 15:08:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:06,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:06,104 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:06,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 15:08:06,305 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1109789857, now seen corresponding path program 67 times [2021-06-05 15:08:06,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:06,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482569499] [2021-06-05 15:08:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:06,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482569499] [2021-06-05 15:08:06,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482569499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325401561] [2021-06-05 15:08:06,611 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:06,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:06,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:06,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:06,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:08:06,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:06,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:06,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:06,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 15:08:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:07,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325401561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:07,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:07,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:07,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404494838] [2021-06-05 15:08:07,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:07,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:07,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:07,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:07,025 INFO L87 Difference]: Start difference. First operand 1299 states and 3120 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:08,968 INFO L93 Difference]: Finished difference Result 2893 states and 7061 transitions. [2021-06-05 15:08:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:08:08,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:08,971 INFO L225 Difference]: With dead ends: 2893 [2021-06-05 15:08:08,971 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 15:08:08,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1359.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:08:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 15:08:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1317. [2021-06-05 15:08:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 2.4065349544072947) internal successors, (3167), 1316 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 3167 transitions. [2021-06-05 15:08:08,986 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 3167 transitions. Word has length 30 [2021-06-05 15:08:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:08,986 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 3167 transitions. [2021-06-05 15:08:08,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 3167 transitions. [2021-06-05 15:08:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:08,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:08,987 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:09,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 15:08:09,188 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:09,188 INFO L82 PathProgramCache]: Analyzing trace with hash 783714749, now seen corresponding path program 68 times [2021-06-05 15:08:09,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:09,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219774379] [2021-06-05 15:08:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:09,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:09,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219774379] [2021-06-05 15:08:09,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219774379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:09,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028436570] [2021-06-05 15:08:09,470 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:09,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:09,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:09,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:09,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:09,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:09,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:09,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:09,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:09,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028436570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:09,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:09,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:09,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047174331] [2021-06-05 15:08:09,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:09,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:09,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:09,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:09,794 INFO L87 Difference]: Start difference. First operand 1317 states and 3167 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:12,025 INFO L93 Difference]: Finished difference Result 3353 states and 8243 transitions. [2021-06-05 15:08:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:08:12,025 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:12,029 INFO L225 Difference]: With dead ends: 3353 [2021-06-05 15:08:12,029 INFO L226 Difference]: Without dead ends: 3340 [2021-06-05 15:08:12,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1455.4ms TimeCoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:08:12,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-06-05 15:08:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 1317. [2021-06-05 15:08:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 2.4065349544072947) internal successors, (3167), 1316 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 3167 transitions. [2021-06-05 15:08:12,045 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 3167 transitions. Word has length 30 [2021-06-05 15:08:12,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:12,045 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 3167 transitions. [2021-06-05 15:08:12,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 3167 transitions. [2021-06-05 15:08:12,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:12,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:12,046 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:12,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:12,247 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:12,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1448917917, now seen corresponding path program 69 times [2021-06-05 15:08:12,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:12,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447672477] [2021-06-05 15:08:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:12,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:12,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447672477] [2021-06-05 15:08:12,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447672477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:12,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32217290] [2021-06-05 15:08:12,542 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:12,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:08:12,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:12,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:12,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:12,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:12,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:12,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:12,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:12,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32217290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:12,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:12,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:08:12,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635184018] [2021-06-05 15:08:12,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:12,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:12,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:12,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:12,849 INFO L87 Difference]: Start difference. First operand 1317 states and 3167 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:14,782 INFO L93 Difference]: Finished difference Result 2888 states and 7090 transitions. [2021-06-05 15:08:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:08:14,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:14,786 INFO L225 Difference]: With dead ends: 2888 [2021-06-05 15:08:14,786 INFO L226 Difference]: Without dead ends: 2870 [2021-06-05 15:08:14,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1139.2ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:08:14,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-06-05 15:08:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 1302. [2021-06-05 15:08:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.4035357417371253) internal successors, (3127), 1301 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 3127 transitions. [2021-06-05 15:08:14,801 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 3127 transitions. Word has length 30 [2021-06-05 15:08:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:14,802 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 3127 transitions. [2021-06-05 15:08:14,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 3127 transitions. [2021-06-05 15:08:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:14,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:14,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:15,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:15,021 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1912243731, now seen corresponding path program 70 times [2021-06-05 15:08:15,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:15,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399386234] [2021-06-05 15:08:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:15,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:15,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399386234] [2021-06-05 15:08:15,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399386234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:15,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287839687] [2021-06-05 15:08:15,327 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:15,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:15,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:15,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:15,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:15,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:08:15,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:15,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:15,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:15,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 15:08:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:15,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287839687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:15,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:15,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:15,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478210723] [2021-06-05 15:08:15,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:15,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:15,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:15,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:15,726 INFO L87 Difference]: Start difference. First operand 1302 states and 3127 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:17,350 INFO L93 Difference]: Finished difference Result 2738 states and 6704 transitions. [2021-06-05 15:08:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:08:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:17,354 INFO L225 Difference]: With dead ends: 2738 [2021-06-05 15:08:17,354 INFO L226 Difference]: Without dead ends: 2729 [2021-06-05 15:08:17,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1105.2ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:08:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-05 15:08:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 1299. [2021-06-05 15:08:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.403697996918336) internal successors, (3120), 1298 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3120 transitions. [2021-06-05 15:08:17,370 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3120 transitions. Word has length 30 [2021-06-05 15:08:17,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:17,370 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3120 transitions. [2021-06-05 15:08:17,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3120 transitions. [2021-06-05 15:08:17,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:17,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:17,371 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:17,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable561 [2021-06-05 15:08:17,585 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:17,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1832618439, now seen corresponding path program 71 times [2021-06-05 15:08:17,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:17,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320586159] [2021-06-05 15:08:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:17,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320586159] [2021-06-05 15:08:17,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320586159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858517131] [2021-06-05 15:08:17,954 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:08:17,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:08:17,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:17,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:17,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:18,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:08:18,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:18,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:18,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:18,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 15:08:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:18,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858517131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:18,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:18,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:18,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851241032] [2021-06-05 15:08:18,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:18,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:18,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:18,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:18,295 INFO L87 Difference]: Start difference. First operand 1299 states and 3120 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:20,223 INFO L93 Difference]: Finished difference Result 2709 states and 6643 transitions. [2021-06-05 15:08:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:08:20,223 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:20,226 INFO L225 Difference]: With dead ends: 2709 [2021-06-05 15:08:20,226 INFO L226 Difference]: Without dead ends: 2692 [2021-06-05 15:08:20,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1501.2ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:08:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-06-05 15:08:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 1312. [2021-06-05 15:08:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 2.404271548436308) internal successors, (3152), 1311 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 3152 transitions. [2021-06-05 15:08:20,240 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 3152 transitions. Word has length 30 [2021-06-05 15:08:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:20,240 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 3152 transitions. [2021-06-05 15:08:20,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 3152 transitions. [2021-06-05 15:08:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:20,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:20,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:20,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:20,442 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1212131303, now seen corresponding path program 72 times [2021-06-05 15:08:20,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:20,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583620400] [2021-06-05 15:08:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:20,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:20,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583620400] [2021-06-05 15:08:20,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583620400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:20,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778599992] [2021-06-05 15:08:20,780 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:20,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:08:20,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:20,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:20,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:21,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:21,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:21,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:21,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:21,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:21,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778599992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:21,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:21,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:21,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523639965] [2021-06-05 15:08:21,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:21,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:21,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:21,113 INFO L87 Difference]: Start difference. First operand 1312 states and 3152 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:23,821 INFO L93 Difference]: Finished difference Result 3265 states and 8036 transitions. [2021-06-05 15:08:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:08:23,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:23,825 INFO L225 Difference]: With dead ends: 3265 [2021-06-05 15:08:23,825 INFO L226 Difference]: Without dead ends: 3250 [2021-06-05 15:08:23,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1854.2ms TimeCoverageRelationStatistics Valid=443, Invalid=2007, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:08:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-06-05 15:08:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 1312. [2021-06-05 15:08:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 2.404271548436308) internal successors, (3152), 1311 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 3152 transitions. [2021-06-05 15:08:23,841 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 3152 transitions. Word has length 30 [2021-06-05 15:08:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:23,841 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 3152 transitions. [2021-06-05 15:08:23,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 3152 transitions. [2021-06-05 15:08:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:23,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:23,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:24,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 15:08:24,043 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1877334471, now seen corresponding path program 73 times [2021-06-05 15:08:24,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:24,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011089284] [2021-06-05 15:08:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:24,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:24,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011089284] [2021-06-05 15:08:24,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011089284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:24,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740012603] [2021-06-05 15:08:24,371 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:24,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:24,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:24,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:24,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:24,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:24,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:24,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:24,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740012603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:24,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:24,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:08:24,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516206673] [2021-06-05 15:08:24,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:24,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:24,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:24,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:24,652 INFO L87 Difference]: Start difference. First operand 1312 states and 3152 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:26,752 INFO L93 Difference]: Finished difference Result 2759 states and 6774 transitions. [2021-06-05 15:08:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:08:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:26,756 INFO L225 Difference]: With dead ends: 2759 [2021-06-05 15:08:26,756 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 15:08:26,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1398.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:08:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 15:08:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1303. [2021-06-05 15:08:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 2.403225806451613) internal successors, (3129), 1302 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 3129 transitions. [2021-06-05 15:08:26,771 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 3129 transitions. Word has length 30 [2021-06-05 15:08:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:26,771 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 3129 transitions. [2021-06-05 15:08:26,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 3129 transitions. [2021-06-05 15:08:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:26,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:26,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:26,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:26,973 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1995303287, now seen corresponding path program 74 times [2021-06-05 15:08:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:26,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460696410] [2021-06-05 15:08:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:27,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:27,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460696410] [2021-06-05 15:08:27,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460696410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:27,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911054070] [2021-06-05 15:08:27,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:27,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:27,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:27,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:27,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:27,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:27,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:27,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:27,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:27,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:27,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911054070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:27,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:27,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:08:27,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126347101] [2021-06-05 15:08:27,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:27,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:27,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:27,576 INFO L87 Difference]: Start difference. First operand 1303 states and 3129 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:29,804 INFO L93 Difference]: Finished difference Result 3016 states and 7475 transitions. [2021-06-05 15:08:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:08:29,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:29,807 INFO L225 Difference]: With dead ends: 3016 [2021-06-05 15:08:29,807 INFO L226 Difference]: Without dead ends: 3003 [2021-06-05 15:08:29,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1593.8ms TimeCoverageRelationStatistics Valid=305, Invalid=1857, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:08:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-06-05 15:08:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 1306. [2021-06-05 15:08:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 2.403065134099617) internal successors, (3136), 1305 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 3136 transitions. [2021-06-05 15:08:29,823 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 3136 transitions. Word has length 30 [2021-06-05 15:08:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:29,823 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 3136 transitions. [2021-06-05 15:08:29,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 3136 transitions. [2021-06-05 15:08:29,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:29,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:29,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:30,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 15:08:30,025 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:30,025 INFO L82 PathProgramCache]: Analyzing trace with hash -238902237, now seen corresponding path program 75 times [2021-06-05 15:08:30,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:30,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404347538] [2021-06-05 15:08:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:30,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:30,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404347538] [2021-06-05 15:08:30,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404347538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:30,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025119707] [2021-06-05 15:08:30,339 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:30,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:08:30,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:30,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:30,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:30,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:30,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:30,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:30,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:30,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025119707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:30,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:30,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:08:30,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587502022] [2021-06-05 15:08:30,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:30,677 INFO L87 Difference]: Start difference. First operand 1306 states and 3136 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:32,996 INFO L93 Difference]: Finished difference Result 2692 states and 6626 transitions. [2021-06-05 15:08:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:08:32,996 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:32,999 INFO L225 Difference]: With dead ends: 2692 [2021-06-05 15:08:32,999 INFO L226 Difference]: Without dead ends: 2675 [2021-06-05 15:08:32,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1688.0ms TimeCoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:08:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2021-06-05 15:08:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 1306. [2021-06-05 15:08:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 2.403065134099617) internal successors, (3136), 1305 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 3136 transitions. [2021-06-05 15:08:33,014 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 3136 transitions. Word has length 30 [2021-06-05 15:08:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:33,014 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 3136 transitions. [2021-06-05 15:08:33,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 3136 transitions. [2021-06-05 15:08:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:33,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:33,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:33,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:33,216 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:33,216 INFO L82 PathProgramCache]: Analyzing trace with hash 296541971, now seen corresponding path program 76 times [2021-06-05 15:08:33,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:33,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961539192] [2021-06-05 15:08:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:33,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:33,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961539192] [2021-06-05 15:08:33,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961539192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:33,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394761224] [2021-06-05 15:08:33,531 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:33,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:33,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:33,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:33,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:33,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:33,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:33,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:33,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:33,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:08:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:33,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394761224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:33,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:33,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:08:33,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510944844] [2021-06-05 15:08:33,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:33,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:33,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:33,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:33,875 INFO L87 Difference]: Start difference. First operand 1306 states and 3136 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:36,486 INFO L93 Difference]: Finished difference Result 2662 states and 6536 transitions. [2021-06-05 15:08:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:08:36,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:36,492 INFO L225 Difference]: With dead ends: 2662 [2021-06-05 15:08:36,492 INFO L226 Difference]: Without dead ends: 2652 [2021-06-05 15:08:36,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1507.3ms TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:08:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-06-05 15:08:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1300. [2021-06-05 15:08:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.4033872209391838) internal successors, (3122), 1299 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3122 transitions. [2021-06-05 15:08:36,507 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3122 transitions. Word has length 30 [2021-06-05 15:08:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:36,507 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 3122 transitions. [2021-06-05 15:08:36,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3122 transitions. [2021-06-05 15:08:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:36,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:36,508 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:36,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:36,709 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:36,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:36,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1533189809, now seen corresponding path program 77 times [2021-06-05 15:08:36,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:36,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021873206] [2021-06-05 15:08:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:37,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:37,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021873206] [2021-06-05 15:08:37,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021873206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:37,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649318066] [2021-06-05 15:08:37,073 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:37,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:08:37,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:37,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:37,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:37,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:08:37,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:37,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:37,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:37,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 15:08:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:37,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649318066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:37,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:37,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:37,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94687457] [2021-06-05 15:08:37,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:37,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:37,402 INFO L87 Difference]: Start difference. First operand 1300 states and 3122 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:39,160 INFO L93 Difference]: Finished difference Result 2869 states and 7011 transitions. [2021-06-05 15:08:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:08:39,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:39,163 INFO L225 Difference]: With dead ends: 2869 [2021-06-05 15:08:39,163 INFO L226 Difference]: Without dead ends: 2852 [2021-06-05 15:08:39,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1495.1ms TimeCoverageRelationStatistics Valid=334, Invalid=1388, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:08:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-06-05 15:08:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1318. [2021-06-05 15:08:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4062262718299166) internal successors, (3169), 1317 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3169 transitions. [2021-06-05 15:08:39,178 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3169 transitions. Word has length 30 [2021-06-05 15:08:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:39,178 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3169 transitions. [2021-06-05 15:08:39,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3169 transitions. [2021-06-05 15:08:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:39,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:39,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:39,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 15:08:39,380 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1806861547, now seen corresponding path program 78 times [2021-06-05 15:08:39,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:39,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458950594] [2021-06-05 15:08:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:39,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:39,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458950594] [2021-06-05 15:08:39,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458950594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:39,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537154037] [2021-06-05 15:08:39,723 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:39,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:08:39,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:39,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:40,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:40,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:40,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:40,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:40,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:40,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537154037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:40,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:40,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:40,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152486974] [2021-06-05 15:08:40,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:40,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:40,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:40,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:40,084 INFO L87 Difference]: Start difference. First operand 1318 states and 3169 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:42,815 INFO L93 Difference]: Finished difference Result 3336 states and 8208 transitions. [2021-06-05 15:08:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:08:42,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:42,819 INFO L225 Difference]: With dead ends: 3336 [2021-06-05 15:08:42,819 INFO L226 Difference]: Without dead ends: 3323 [2021-06-05 15:08:42,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1941.5ms TimeCoverageRelationStatistics Valid=448, Invalid=2002, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:08:42,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-06-05 15:08:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 1318. [2021-06-05 15:08:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4062262718299166) internal successors, (3169), 1317 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3169 transitions. [2021-06-05 15:08:42,836 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3169 transitions. Word has length 30 [2021-06-05 15:08:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:42,836 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3169 transitions. [2021-06-05 15:08:42,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3169 transitions. [2021-06-05 15:08:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:42,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:42,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:43,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 15:08:43,038 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1822902581, now seen corresponding path program 79 times [2021-06-05 15:08:43,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:43,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444729006] [2021-06-05 15:08:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:43,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:43,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444729006] [2021-06-05 15:08:43,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444729006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:43,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956276877] [2021-06-05 15:08:43,372 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:43,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:43,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:43,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:43,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:43,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:43,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:43,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956276877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:08:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941133961] [2021-06-05 15:08:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:43,731 INFO L87 Difference]: Start difference. First operand 1318 states and 3169 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:45,858 INFO L93 Difference]: Finished difference Result 2853 states and 7009 transitions. [2021-06-05 15:08:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:08:45,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:45,861 INFO L225 Difference]: With dead ends: 2853 [2021-06-05 15:08:45,861 INFO L226 Difference]: Without dead ends: 2835 [2021-06-05 15:08:45,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1554.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:08:45,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2021-06-05 15:08:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1303. [2021-06-05 15:08:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 2.403225806451613) internal successors, (3129), 1302 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 3129 transitions. [2021-06-05 15:08:45,878 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 3129 transitions. Word has length 30 [2021-06-05 15:08:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:45,878 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 3129 transitions. [2021-06-05 15:08:45,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 3129 transitions. [2021-06-05 15:08:45,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:45,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:45,879 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:46,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:46,081 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:46,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1221301505, now seen corresponding path program 80 times [2021-06-05 15:08:46,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:46,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053458531] [2021-06-05 15:08:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:46,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:46,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053458531] [2021-06-05 15:08:46,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053458531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:46,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133070477] [2021-06-05 15:08:46,378 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:46,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:46,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:46,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:46,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:08:46,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:46,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:46,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:46,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 15:08:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:46,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133070477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:46,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:46,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:46,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111093895] [2021-06-05 15:08:46,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:46,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:46,693 INFO L87 Difference]: Start difference. First operand 1303 states and 3129 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:48,392 INFO L93 Difference]: Finished difference Result 2717 states and 6653 transitions. [2021-06-05 15:08:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:08:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:48,395 INFO L225 Difference]: With dead ends: 2717 [2021-06-05 15:08:48,395 INFO L226 Difference]: Without dead ends: 2708 [2021-06-05 15:08:48,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1046.8ms TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:08:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-06-05 15:08:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 1299. [2021-06-05 15:08:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.403697996918336) internal successors, (3120), 1298 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3120 transitions. [2021-06-05 15:08:48,411 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3120 transitions. Word has length 30 [2021-06-05 15:08:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:48,411 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3120 transitions. [2021-06-05 15:08:48,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3120 transitions. [2021-06-05 15:08:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:48,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:48,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:48,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:48,612 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1777200353, now seen corresponding path program 81 times [2021-06-05 15:08:48,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:48,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032806915] [2021-06-05 15:08:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:48,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:48,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032806915] [2021-06-05 15:08:48,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032806915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:48,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738490975] [2021-06-05 15:08:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:49,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:08:49,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:49,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:49,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:49,403 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 19 treesize of output 35 [2021-06-05 15:08:49,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:49,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:49,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:49,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:195 [2021-06-05 15:08:49,656 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-05 15:08:49,831 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-06-05 15:08:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:49,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738490975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:49,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:49,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 15:08:49,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648954894] [2021-06-05 15:08:49,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:08:49,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:08:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:08:49,872 INFO L87 Difference]: Start difference. First operand 1299 states and 3120 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:50,824 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2021-06-05 15:08:51,045 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-05 15:08:51,605 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 15:08:51,754 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-06-05 15:08:51,962 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 15:08:52,931 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 15:08:53,349 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 15:08:54,195 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 15:08:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:54,797 INFO L93 Difference]: Finished difference Result 2829 states and 6924 transitions. [2021-06-05 15:08:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:08:54,798 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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 30 [2021-06-05 15:08:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:54,800 INFO L225 Difference]: With dead ends: 2829 [2021-06-05 15:08:54,801 INFO L226 Difference]: Without dead ends: 2814 [2021-06-05 15:08:54,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4552.8ms TimeCoverageRelationStatistics Valid=737, Invalid=3955, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:08:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-06-05 15:08:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 1318. [2021-06-05 15:08:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4039483675018984) internal successors, (3166), 1317 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3166 transitions. [2021-06-05 15:08:54,817 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3166 transitions. Word has length 30 [2021-06-05 15:08:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:54,817 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3166 transitions. [2021-06-05 15:08:54,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3166 transitions. [2021-06-05 15:08:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:54,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:54,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:55,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:55,018 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:55,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1156713217, now seen corresponding path program 82 times [2021-06-05 15:08:55,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:55,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907797672] [2021-06-05 15:08:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:55,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:55,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907797672] [2021-06-05 15:08:55,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907797672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:55,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944359956] [2021-06-05 15:08:55,396 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:55,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:55,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:55,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:55,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:55,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:55,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:55,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:55,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:55,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:55,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944359956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:55,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:55,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:08:55,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074926786] [2021-06-05 15:08:55,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:55,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:55,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:55,687 INFO L87 Difference]: Start difference. First operand 1318 states and 3166 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:58,138 INFO L93 Difference]: Finished difference Result 3292 states and 8102 transitions. [2021-06-05 15:08:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:08:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:58,142 INFO L225 Difference]: With dead ends: 3292 [2021-06-05 15:08:58,142 INFO L226 Difference]: Without dead ends: 3277 [2021-06-05 15:08:58,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 2027.4ms TimeCoverageRelationStatistics Valid=513, Invalid=2243, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:08:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2021-06-05 15:08:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 1344. [2021-06-05 15:08:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.4065524944154877) internal successors, (3232), 1343 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3232 transitions. [2021-06-05 15:08:58,158 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3232 transitions. Word has length 30 [2021-06-05 15:08:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:58,159 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 3232 transitions. [2021-06-05 15:08:58,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3232 transitions. [2021-06-05 15:08:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:58,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:58,160 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:58,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 15:08:58,360 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1821916385, now seen corresponding path program 83 times [2021-06-05 15:08:58,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:58,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660571626] [2021-06-05 15:08:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:58,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:58,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660571626] [2021-06-05 15:08:58,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660571626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:58,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061957389] [2021-06-05 15:08:58,746 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:58,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:08:58,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:58,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:58,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:58,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:58,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:58,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:58,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:58,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:59,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061957389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:59,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:59,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:08:59,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740760770] [2021-06-05 15:08:59,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:59,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:59,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:59,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:59,021 INFO L87 Difference]: Start difference. First operand 1344 states and 3232 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:00,800 INFO L93 Difference]: Finished difference Result 2810 states and 6901 transitions. [2021-06-05 15:09:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:09:00,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:00,803 INFO L225 Difference]: With dead ends: 2810 [2021-06-05 15:09:00,803 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 15:09:00,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1323.3ms TimeCoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:09:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 15:09:00,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1335. [2021-06-05 15:09:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 2.4047976011994003) internal successors, (3208), 1334 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 3208 transitions. [2021-06-05 15:09:00,819 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 3208 transitions. Word has length 30 [2021-06-05 15:09:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:00,819 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 3208 transitions. [2021-06-05 15:09:00,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 3208 transitions. [2021-06-05 15:09:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:00,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:00,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:01,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 15:09:01,021 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:01,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2050721373, now seen corresponding path program 84 times [2021-06-05 15:09:01,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:01,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387113349] [2021-06-05 15:09:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:01,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:01,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387113349] [2021-06-05 15:09:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387113349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:01,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979271498] [2021-06-05 15:09:01,401 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:01,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:01,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:01,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:01,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:01,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:01,789 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:01,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:01,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:01,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:01,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-05 15:09:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:01,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979271498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:01,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:01,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:09:01,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132308938] [2021-06-05 15:09:01,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:09:01,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:01,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:09:01,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:09:01,842 INFO L87 Difference]: Start difference. First operand 1335 states and 3208 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:03,407 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-06-05 15:09:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:03,966 INFO L93 Difference]: Finished difference Result 2929 states and 7259 transitions. [2021-06-05 15:09:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:09:03,966 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:03,969 INFO L225 Difference]: With dead ends: 2929 [2021-06-05 15:09:03,969 INFO L226 Difference]: Without dead ends: 2920 [2021-06-05 15:09:03,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1789.4ms TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:09:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-06-05 15:09:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1338. [2021-06-05 15:09:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 2.404637247569185) internal successors, (3215), 1337 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 3215 transitions. [2021-06-05 15:09:03,985 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 3215 transitions. Word has length 30 [2021-06-05 15:09:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:03,985 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 3215 transitions. [2021-06-05 15:09:03,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 3215 transitions. [2021-06-05 15:09:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:03,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:03,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:04,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-06-05 15:09:04,187 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash -294320323, now seen corresponding path program 85 times [2021-06-05 15:09:04,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:04,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947018943] [2021-06-05 15:09:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:04,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947018943] [2021-06-05 15:09:04,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947018943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34177025] [2021-06-05 15:09:04,533 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:04,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:04,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:09:04,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:04,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:04,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:04,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:09:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:04,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34177025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:04,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:04,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:09:04,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151251872] [2021-06-05 15:09:04,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:04,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:04,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:04,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:04,848 INFO L87 Difference]: Start difference. First operand 1338 states and 3215 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:07,429 INFO L93 Difference]: Finished difference Result 2738 states and 6748 transitions. [2021-06-05 15:09:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:09:07,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:07,432 INFO L225 Difference]: With dead ends: 2738 [2021-06-05 15:09:07,432 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 15:09:07,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1619.3ms TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:09:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 15:09:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1348. [2021-06-05 15:09:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 2.406829992576095) internal successors, (3242), 1347 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 3242 transitions. [2021-06-05 15:09:07,447 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 3242 transitions. Word has length 30 [2021-06-05 15:09:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:07,447 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 3242 transitions. [2021-06-05 15:09:07,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 3242 transitions. [2021-06-05 15:09:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:07,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:07,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:07,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:07,649 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash 241123885, now seen corresponding path program 86 times [2021-06-05 15:09:07,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:07,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295511258] [2021-06-05 15:09:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:08,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:08,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295511258] [2021-06-05 15:09:08,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295511258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:08,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499757892] [2021-06-05 15:09:08,011 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:08,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:08,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:08,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:08,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:08,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:08,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:08,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:08,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:09:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:08,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499757892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:08,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:08,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:09:08,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018730392] [2021-06-05 15:09:08,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:08,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:08,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:08,378 INFO L87 Difference]: Start difference. First operand 1348 states and 3242 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:11,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:11,345 INFO L93 Difference]: Finished difference Result 2725 states and 6702 transitions. [2021-06-05 15:09:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:09:11,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:11,348 INFO L225 Difference]: With dead ends: 2725 [2021-06-05 15:09:11,348 INFO L226 Difference]: Without dead ends: 2715 [2021-06-05 15:09:11,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1675.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:09:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-06-05 15:09:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1348. [2021-06-05 15:09:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 2.406829992576095) internal successors, (3242), 1347 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 3242 transitions. [2021-06-05 15:09:11,364 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 3242 transitions. Word has length 30 [2021-06-05 15:09:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:11,364 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 3242 transitions. [2021-06-05 15:09:11,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:11,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 3242 transitions. [2021-06-05 15:09:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:11,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:11,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:11,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-05 15:09:11,565 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:11,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1741846337, now seen corresponding path program 87 times [2021-06-05 15:09:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:11,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428388144] [2021-06-05 15:09:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:11,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428388144] [2021-06-05 15:09:11,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428388144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829918581] [2021-06-05 15:09:11,915 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:11,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:09:11,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:11,938 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:09:11,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:12,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:12,244 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 20 treesize of output 28 [2021-06-05 15:09:12,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:12,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:12,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:12,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:09:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:12,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829918581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:12,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:12,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-06-05 15:09:12,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672462560] [2021-06-05 15:09:12,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:09:12,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:12,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:09:12,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:09:12,492 INFO L87 Difference]: Start difference. First operand 1348 states and 3242 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:09:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:16,826 INFO L93 Difference]: Finished difference Result 3393 states and 8421 transitions. [2021-06-05 15:09:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:09:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:16,830 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 15:09:16,830 INFO L226 Difference]: Without dead ends: 3382 [2021-06-05 15:09:16,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 3209.0ms TimeCoverageRelationStatistics Valid=588, Invalid=3444, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:09:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2021-06-05 15:09:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 1352. [2021-06-05 15:09:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.4078460399703925) internal successors, (3253), 1351 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 3253 transitions. [2021-06-05 15:09:16,847 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 3253 transitions. Word has length 30 [2021-06-05 15:09:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:16,847 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 3253 transitions. [2021-06-05 15:09:16,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:09:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 3253 transitions. [2021-06-05 15:09:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:16,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:16,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:17,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:17,049 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1136219495, now seen corresponding path program 88 times [2021-06-05 15:09:17,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:17,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420308370] [2021-06-05 15:09:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:17,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:17,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420308370] [2021-06-05 15:09:17,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420308370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:17,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987189088] [2021-06-05 15:09:17,456 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:17,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:17,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:17,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:17,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:17,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:17,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:17,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:17,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:09:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:17,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987189088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:17,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:17,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:09:17,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242055058] [2021-06-05 15:09:17,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:17,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:17,790 INFO L87 Difference]: Start difference. First operand 1352 states and 3253 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-06-05 15:09:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:21,727 INFO L93 Difference]: Finished difference Result 3430 states and 8470 transitions. [2021-06-05 15:09:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:09:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:21,731 INFO L225 Difference]: With dead ends: 3430 [2021-06-05 15:09:21,731 INFO L226 Difference]: Without dead ends: 3413 [2021-06-05 15:09:21,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 3188.6ms TimeCoverageRelationStatistics Valid=727, Invalid=3305, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:09:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2021-06-05 15:09:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 1332. [2021-06-05 15:09:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 2.4049586776859506) internal successors, (3201), 1331 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 3201 transitions. [2021-06-05 15:09:21,748 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 3201 transitions. Word has length 30 [2021-06-05 15:09:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:21,749 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 3201 transitions. [2021-06-05 15:09:21,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-06-05 15:09:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 3201 transitions. [2021-06-05 15:09:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:21,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:21,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:21,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 15:09:21,950 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:21,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1703814393, now seen corresponding path program 89 times [2021-06-05 15:09:21,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:21,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755850688] [2021-06-05 15:09:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:22,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:22,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755850688] [2021-06-05 15:09:22,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755850688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:22,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710201990] [2021-06-05 15:09:22,273 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:22,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:22,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:22,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:22,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:09:22,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:22,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:22,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:22,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:09:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:22,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710201990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:22,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:22,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:09:22,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465163959] [2021-06-05 15:09:22,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:22,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:22,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:22,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:22,624 INFO L87 Difference]: Start difference. First operand 1332 states and 3201 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:26,356 INFO L93 Difference]: Finished difference Result 3258 states and 8054 transitions. [2021-06-05 15:09:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:09:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:26,360 INFO L225 Difference]: With dead ends: 3258 [2021-06-05 15:09:26,360 INFO L226 Difference]: Without dead ends: 3245 [2021-06-05 15:09:26,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 2803.9ms TimeCoverageRelationStatistics Valid=527, Invalid=2895, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:09:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-06-05 15:09:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 1344. [2021-06-05 15:09:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.4065524944154877) internal successors, (3232), 1343 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3232 transitions. [2021-06-05 15:09:26,378 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3232 transitions. Word has length 30 [2021-06-05 15:09:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:26,378 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 3232 transitions. [2021-06-05 15:09:26,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3232 transitions. [2021-06-05 15:09:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:26,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:26,379 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:26,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 15:09:26,580 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash -834751853, now seen corresponding path program 90 times [2021-06-05 15:09:26,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:26,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546959507] [2021-06-05 15:09:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:26,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546959507] [2021-06-05 15:09:26,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546959507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948468755] [2021-06-05 15:09:26,925 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:26,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:26,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:26,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:26,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:27,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:27,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:27,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:27,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:27,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:09:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:27,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948468755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:27,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:27,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:09:27,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531616821] [2021-06-05 15:09:27,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:27,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:27,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:27,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:27,253 INFO L87 Difference]: Start difference. First operand 1344 states and 3232 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:30,454 INFO L93 Difference]: Finished difference Result 2863 states and 7051 transitions. [2021-06-05 15:09:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:09:30,455 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:30,458 INFO L225 Difference]: With dead ends: 2863 [2021-06-05 15:09:30,458 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 15:09:30,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2425.9ms TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:09:30,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 15:09:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1344. [2021-06-05 15:09:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.4065524944154877) internal successors, (3232), 1343 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3232 transitions. [2021-06-05 15:09:30,475 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3232 transitions. Word has length 30 [2021-06-05 15:09:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:30,475 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 3232 transitions. [2021-06-05 15:09:30,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3232 transitions. [2021-06-05 15:09:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:30,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:30,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:30,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:30,676 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:30,676 INFO L82 PathProgramCache]: Analyzing trace with hash -299307645, now seen corresponding path program 91 times [2021-06-05 15:09:30,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:30,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496538179] [2021-06-05 15:09:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:30,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:30,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496538179] [2021-06-05 15:09:30,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496538179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:30,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755621385] [2021-06-05 15:09:30,996 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:31,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:31,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:31,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:31,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:31,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:31,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:09:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:31,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755621385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:31,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:31,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:09:31,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572127736] [2021-06-05 15:09:31,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:31,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:31,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:31,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:31,343 INFO L87 Difference]: Start difference. First operand 1344 states and 3232 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:34,634 INFO L93 Difference]: Finished difference Result 2773 states and 6815 transitions. [2021-06-05 15:09:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:09:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:34,638 INFO L225 Difference]: With dead ends: 2773 [2021-06-05 15:09:34,638 INFO L226 Difference]: Without dead ends: 2763 [2021-06-05 15:09:34,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 2396.2ms TimeCoverageRelationStatistics Valid=408, Invalid=2562, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:09:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-06-05 15:09:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 1341. [2021-06-05 15:09:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.406716417910448) internal successors, (3225), 1340 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3225 transitions. [2021-06-05 15:09:34,653 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3225 transitions. Word has length 30 [2021-06-05 15:09:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:34,653 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3225 transitions. [2021-06-05 15:09:34,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3225 transitions. [2021-06-05 15:09:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:34,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:34,654 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:34,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-06-05 15:09:34,855 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash 105438493, now seen corresponding path program 92 times [2021-06-05 15:09:34,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:34,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120244893] [2021-06-05 15:09:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:35,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:35,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120244893] [2021-06-05 15:09:35,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120244893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:35,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474307767] [2021-06-05 15:09:35,194 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:35,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:35,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:35,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:35,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:35,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:35,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:35,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:35,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:35,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:09:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:35,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474307767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:35,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:35,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:09:35,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621565357] [2021-06-05 15:09:35,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:35,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:35,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:35,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:35,578 INFO L87 Difference]: Start difference. First operand 1341 states and 3225 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:38,384 INFO L93 Difference]: Finished difference Result 2759 states and 6787 transitions. [2021-06-05 15:09:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:09:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:38,387 INFO L225 Difference]: With dead ends: 2759 [2021-06-05 15:09:38,387 INFO L226 Difference]: Without dead ends: 2749 [2021-06-05 15:09:38,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1782.5ms TimeCoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:09:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-06-05 15:09:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 1331. [2021-06-05 15:09:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 2.405263157894737) internal successors, (3199), 1330 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 3199 transitions. [2021-06-05 15:09:38,403 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 3199 transitions. Word has length 30 [2021-06-05 15:09:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:38,403 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 3199 transitions. [2021-06-05 15:09:38,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 3199 transitions. [2021-06-05 15:09:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:38,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:38,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:38,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:38,605 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash -466473999, now seen corresponding path program 93 times [2021-06-05 15:09:38,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:38,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740554661] [2021-06-05 15:09:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:38,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:38,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740554661] [2021-06-05 15:09:38,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740554661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:38,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451510187] [2021-06-05 15:09:38,953 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:38,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:09:38,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:38,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:39,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:39,299 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 20 treesize of output 36 [2021-06-05 15:09:39,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:39,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:39,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:39,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-06-05 15:09:39,674 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-06-05 15:09:39,957 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-05 15:09:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:39,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451510187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:39,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:39,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 15:09:39,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941609982] [2021-06-05 15:09:39,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:09:39,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:39,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:09:39,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:09:39,999 INFO L87 Difference]: Start difference. First operand 1331 states and 3199 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:40,350 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 15:09:41,132 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 15:09:41,912 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2021-06-05 15:09:42,558 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 15:09:43,052 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-05 15:09:43,288 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2021-06-05 15:09:43,471 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-06-05 15:09:43,712 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-06-05 15:09:44,125 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2021-06-05 15:09:44,292 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-06-05 15:09:45,603 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-06-05 15:09:46,198 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 15:09:46,337 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2021-06-05 15:09:47,606 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-05 15:09:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:47,677 INFO L93 Difference]: Finished difference Result 3387 states and 8320 transitions. [2021-06-05 15:09:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 15:09:47,677 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:47,681 INFO L225 Difference]: With dead ends: 3387 [2021-06-05 15:09:47,681 INFO L226 Difference]: Without dead ends: 3372 [2021-06-05 15:09:47,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 7100.2ms TimeCoverageRelationStatistics Valid=1115, Invalid=5365, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:09:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-06-05 15:09:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 1349. [2021-06-05 15:09:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.408753709198813) internal successors, (3247), 1348 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3247 transitions. [2021-06-05 15:09:47,699 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3247 transitions. Word has length 30 [2021-06-05 15:09:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:47,699 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 3247 transitions. [2021-06-05 15:09:47,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3247 transitions. [2021-06-05 15:09:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:47,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:47,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:47,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-06-05 15:09:47,901 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:47,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:47,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1557671881, now seen corresponding path program 94 times [2021-06-05 15:09:47,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:47,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753076862] [2021-06-05 15:09:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:48,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:48,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753076862] [2021-06-05 15:09:48,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753076862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:48,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040735635] [2021-06-05 15:09:48,250 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:48,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:48,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:48,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:48,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:48,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:48,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:48,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:48,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:48,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:09:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:48,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040735635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:48,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:48,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:09:48,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847614562] [2021-06-05 15:09:48,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:48,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:48,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:48,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:48,572 INFO L87 Difference]: Start difference. First operand 1349 states and 3247 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:50,915 INFO L93 Difference]: Finished difference Result 3105 states and 7675 transitions. [2021-06-05 15:09:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:09:50,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:50,918 INFO L225 Difference]: With dead ends: 3105 [2021-06-05 15:09:50,918 INFO L226 Difference]: Without dead ends: 3092 [2021-06-05 15:09:50,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1656.1ms TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:09:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2021-06-05 15:09:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 1362. [2021-06-05 15:09:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 2.4099926524614252) internal successors, (3280), 1361 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 3280 transitions. [2021-06-05 15:09:50,934 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 3280 transitions. Word has length 30 [2021-06-05 15:09:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:50,934 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 3280 transitions. [2021-06-05 15:09:50,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 3280 transitions. [2021-06-05 15:09:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:50,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:50,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:51,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:51,136 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash 198729169, now seen corresponding path program 95 times [2021-06-05 15:09:51,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:51,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45507257] [2021-06-05 15:09:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:51,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:51,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45507257] [2021-06-05 15:09:51,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45507257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:51,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217155886] [2021-06-05 15:09:51,492 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:51,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:51,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:51,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:51,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:51,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:09:51,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:51,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:51,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:51,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:09:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:51,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217155886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:51,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:51,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:09:51,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196996899] [2021-06-05 15:09:51,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:51,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:51,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:51,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:51,821 INFO L87 Difference]: Start difference. First operand 1362 states and 3280 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:53,783 INFO L93 Difference]: Finished difference Result 2817 states and 6924 transitions. [2021-06-05 15:09:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:09:53,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:53,787 INFO L225 Difference]: With dead ends: 2817 [2021-06-05 15:09:53,787 INFO L226 Difference]: Without dead ends: 2799 [2021-06-05 15:09:53,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1470.5ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:09:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-05 15:09:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1347. [2021-06-05 15:09:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 2.4071322436849925) internal successors, (3240), 1346 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 3240 transitions. [2021-06-05 15:09:53,802 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 3240 transitions. Word has length 30 [2021-06-05 15:09:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:53,802 INFO L482 AbstractCegarLoop]: Abstraction has 1347 states and 3240 transitions. [2021-06-05 15:09:53,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 3240 transitions. [2021-06-05 15:09:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:53,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:53,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:54,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:54,004 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:54,004 INFO L82 PathProgramCache]: Analyzing trace with hash 621058707, now seen corresponding path program 96 times [2021-06-05 15:09:54,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:54,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644456292] [2021-06-05 15:09:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:54,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:54,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644456292] [2021-06-05 15:09:54,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644456292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:54,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520431675] [2021-06-05 15:09:54,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:54,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:54,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:54,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:54,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:54,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:54,703 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-06-05 15:09:54,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:54,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:54,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:54,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:11 [2021-06-05 15:09:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:54,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520431675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:54,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:54,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:09:54,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913757781] [2021-06-05 15:09:54,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:09:54,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:09:54,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:09:54,751 INFO L87 Difference]: Start difference. First operand 1347 states and 3240 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:56,412 INFO L93 Difference]: Finished difference Result 2930 states and 7263 transitions. [2021-06-05 15:09:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:09:56,412 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:56,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:56,415 INFO L225 Difference]: With dead ends: 2930 [2021-06-05 15:09:56,415 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 15:09:56,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1346.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:09:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 15:09:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1350. [2021-06-05 15:09:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 2.406968124536694) internal successors, (3247), 1349 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 3247 transitions. [2021-06-05 15:09:56,430 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 3247 transitions. Word has length 30 [2021-06-05 15:09:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:56,431 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 3247 transitions. [2021-06-05 15:09:56,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 3247 transitions. [2021-06-05 15:09:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:56,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:56,432 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:56,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:56,632 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:56,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:56,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1917507539, now seen corresponding path program 97 times [2021-06-05 15:09:56,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:56,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330611975] [2021-06-05 15:09:56,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:56,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:56,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330611975] [2021-06-05 15:09:56,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330611975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:56,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964207940] [2021-06-05 15:09:56,930 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:56,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:56,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:57,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:57,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:57,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:57,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:57,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:09:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:57,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964207940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:57,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:57,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 15:09:57,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205343303] [2021-06-05 15:09:57,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:57,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:57,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:57,202 INFO L87 Difference]: Start difference. First operand 1350 states and 3247 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:59,531 INFO L93 Difference]: Finished difference Result 2754 states and 6789 transitions. [2021-06-05 15:09:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:09:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:59,534 INFO L225 Difference]: With dead ends: 2754 [2021-06-05 15:09:59,534 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 15:09:59,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1443.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:09:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 15:09:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1360. [2021-06-05 15:09:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.4091243561442237) internal successors, (3274), 1359 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3274 transitions. [2021-06-05 15:09:59,550 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3274 transitions. Word has length 30 [2021-06-05 15:09:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:59,550 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3274 transitions. [2021-06-05 15:09:59,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3274 transitions. [2021-06-05 15:09:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:59,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:59,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:59,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:59,752 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:59,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1382063331, now seen corresponding path program 98 times [2021-06-05 15:09:59,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:59,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889404217] [2021-06-05 15:09:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:00,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:00,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889404217] [2021-06-05 15:10:00,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889404217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:00,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122354699] [2021-06-05 15:10:00,046 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:00,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:00,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:00,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:00,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:00,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:00,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:00,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:00,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:00,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:10:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:00,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122354699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:00,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:00,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:10:00,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943806726] [2021-06-05 15:10:00,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:00,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:00,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:00,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:00,398 INFO L87 Difference]: Start difference. First operand 1360 states and 3274 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:03,502 INFO L93 Difference]: Finished difference Result 2734 states and 6722 transitions. [2021-06-05 15:10:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:10:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:03,505 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 15:10:03,505 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 15:10:03,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1560.5ms TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:10:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 15:10:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1360. [2021-06-05 15:10:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.4091243561442237) internal successors, (3274), 1359 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3274 transitions. [2021-06-05 15:10:03,522 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3274 transitions. Word has length 30 [2021-06-05 15:10:03,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:03,522 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3274 transitions. [2021-06-05 15:10:03,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3274 transitions. [2021-06-05 15:10:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:03,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:03,524 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:03,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable617 [2021-06-05 15:10:03,724 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:03,724 INFO L82 PathProgramCache]: Analyzing trace with hash 929933743, now seen corresponding path program 99 times [2021-06-05 15:10:03,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:03,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620300069] [2021-06-05 15:10:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:04,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620300069] [2021-06-05 15:10:04,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620300069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126469656] [2021-06-05 15:10:04,057 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:04,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:10:04,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:04,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:10:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:04,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:04,382 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 20 treesize of output 28 [2021-06-05 15:10:04,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:04,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:04,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:04,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:10:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:04,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126469656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:04,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:04,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-06-05 15:10:04,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432907693] [2021-06-05 15:10:04,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:10:04,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:04,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:10:04,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:10:04,607 INFO L87 Difference]: Start difference. First operand 1360 states and 3274 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:10:06,835 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-05 15:10:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:08,372 INFO L93 Difference]: Finished difference Result 3408 states and 8465 transitions. [2021-06-05 15:10:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:10:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:08,376 INFO L225 Difference]: With dead ends: 3408 [2021-06-05 15:10:08,376 INFO L226 Difference]: Without dead ends: 3397 [2021-06-05 15:10:08,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 3059.6ms TimeCoverageRelationStatistics Valid=545, Invalid=3237, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:10:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2021-06-05 15:10:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 1364. [2021-06-05 15:10:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 2.410124724871607) internal successors, (3285), 1363 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 3285 transitions. [2021-06-05 15:10:08,393 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 3285 transitions. Word has length 30 [2021-06-05 15:10:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:08,394 INFO L482 AbstractCegarLoop]: Abstraction has 1364 states and 3285 transitions. [2021-06-05 15:10:08,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-06-05 15:10:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 3285 transitions. [2021-06-05 15:10:08,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:08,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:08,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:08,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:08,595 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:08,596 INFO L82 PathProgramCache]: Analyzing trace with hash -486967721, now seen corresponding path program 100 times [2021-06-05 15:10:08,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:08,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945409890] [2021-06-05 15:10:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:08,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:08,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945409890] [2021-06-05 15:10:08,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945409890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:08,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925884678] [2021-06-05 15:10:08,931 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:08,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:08,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:08,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:08,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:09,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:09,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:09,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:09,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:09,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:10:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:09,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925884678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:09,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:09,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:10:09,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642092896] [2021-06-05 15:10:09,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:09,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:09,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:09,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:09,273 INFO L87 Difference]: Start difference. First operand 1364 states and 3285 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-06-05 15:10:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:13,178 INFO L93 Difference]: Finished difference Result 3476 states and 8584 transitions. [2021-06-05 15:10:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:10:13,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:13,182 INFO L225 Difference]: With dead ends: 3476 [2021-06-05 15:10:13,182 INFO L226 Difference]: Without dead ends: 3459 [2021-06-05 15:10:13,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3011.3ms TimeCoverageRelationStatistics Valid=729, Invalid=3303, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:10:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2021-06-05 15:10:13,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 1342. [2021-06-05 15:10:13,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 2.407158836689038) internal successors, (3228), 1341 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 3228 transitions. [2021-06-05 15:10:13,200 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 3228 transitions. Word has length 30 [2021-06-05 15:10:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:13,200 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 3228 transitions. [2021-06-05 15:10:13,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-06-05 15:10:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 3228 transitions. [2021-06-05 15:10:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:13,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:13,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:13,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:13,402 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:13,402 INFO L82 PathProgramCache]: Analyzing trace with hash 827138373, now seen corresponding path program 101 times [2021-06-05 15:10:13,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:13,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875049834] [2021-06-05 15:10:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:13,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:13,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875049834] [2021-06-05 15:10:13,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875049834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:13,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456318920] [2021-06-05 15:10:13,775 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:13,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:10:13,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:13,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:13,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:14,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:10:14,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:14,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:14,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:14,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 15:10:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:14,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456318920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:14,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:14,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:10:14,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716306563] [2021-06-05 15:10:14,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:14,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:14,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:14,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:14,128 INFO L87 Difference]: Start difference. First operand 1342 states and 3228 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:16,081 INFO L93 Difference]: Finished difference Result 2761 states and 6769 transitions. [2021-06-05 15:10:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:10:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:16,084 INFO L225 Difference]: With dead ends: 2761 [2021-06-05 15:10:16,084 INFO L226 Difference]: Without dead ends: 2743 [2021-06-05 15:10:16,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1601.7ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:10:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2021-06-05 15:10:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 1341. [2021-06-05 15:10:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.4074626865671642) internal successors, (3226), 1340 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3226 transitions. [2021-06-05 15:10:16,104 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3226 transitions. Word has length 30 [2021-06-05 15:10:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:16,104 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3226 transitions. [2021-06-05 15:10:16,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3226 transitions. [2021-06-05 15:10:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:16,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:16,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:16,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-06-05 15:10:16,305 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:16,306 INFO L82 PathProgramCache]: Analyzing trace with hash -145415493, now seen corresponding path program 102 times [2021-06-05 15:10:16,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:16,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342148077] [2021-06-05 15:10:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:16,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:16,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342148077] [2021-06-05 15:10:16,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342148077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:16,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14669904] [2021-06-05 15:10:16,638 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:16,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:10:16,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:16,660 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:16,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:10:16,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:16,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:16,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:16,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 15:10:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:16,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14669904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:16,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:16,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:10:16,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408545379] [2021-06-05 15:10:16,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:16,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:16,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:16,944 INFO L87 Difference]: Start difference. First operand 1341 states and 3226 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:19,103 INFO L93 Difference]: Finished difference Result 2916 states and 7128 transitions. [2021-06-05 15:10:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:10:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:19,106 INFO L225 Difference]: With dead ends: 2916 [2021-06-05 15:10:19,107 INFO L226 Difference]: Without dead ends: 2899 [2021-06-05 15:10:19,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1466.7ms TimeCoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:10:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-06-05 15:10:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 1359. [2021-06-05 15:10:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.409425625920471) internal successors, (3272), 1358 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3272 transitions. [2021-06-05 15:10:19,122 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3272 transitions. Word has length 30 [2021-06-05 15:10:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:19,122 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 3272 transitions. [2021-06-05 15:10:19,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3272 transitions. [2021-06-05 15:10:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:19,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:19,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:19,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:19,324 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:19,324 INFO L82 PathProgramCache]: Analyzing trace with hash -962941637, now seen corresponding path program 103 times [2021-06-05 15:10:19,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:19,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229798468] [2021-06-05 15:10:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:19,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229798468] [2021-06-05 15:10:19,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229798468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:19,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929113030] [2021-06-05 15:10:19,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:19,664 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:19,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:19,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:10:19,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:19,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:19,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:19,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:10:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:19,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929113030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:19,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:19,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:10:19,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095107821] [2021-06-05 15:10:19,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:19,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:19,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:19,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:19,933 INFO L87 Difference]: Start difference. First operand 1359 states and 3272 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:21,959 INFO L93 Difference]: Finished difference Result 3139 states and 7742 transitions. [2021-06-05 15:10:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:10:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:21,963 INFO L225 Difference]: With dead ends: 3139 [2021-06-05 15:10:21,963 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 15:10:21,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1466.9ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:10:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 15:10:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 1340. [2021-06-05 15:10:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.4070201643017177) internal successors, (3223), 1339 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 3223 transitions. [2021-06-05 15:10:21,981 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 3223 transitions. Word has length 30 [2021-06-05 15:10:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:21,981 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 3223 transitions. [2021-06-05 15:10:21,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 3223 transitions. [2021-06-05 15:10:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:21,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:21,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:22,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:22,183 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:22,183 INFO L82 PathProgramCache]: Analyzing trace with hash 793459413, now seen corresponding path program 104 times [2021-06-05 15:10:22,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:22,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078725518] [2021-06-05 15:10:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:22,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:22,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078725518] [2021-06-05 15:10:22,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078725518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:22,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042993985] [2021-06-05 15:10:22,505 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:22,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:22,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:22,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:22,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:22,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:22,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:10:22,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:22,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:22,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:22,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:10:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:22,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042993985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:22,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:22,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:10:22,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096853642] [2021-06-05 15:10:22,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:22,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:22,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:22,827 INFO L87 Difference]: Start difference. First operand 1340 states and 3223 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:24,712 INFO L93 Difference]: Finished difference Result 2878 states and 7072 transitions. [2021-06-05 15:10:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:10:24,712 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:24,716 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 15:10:24,716 INFO L226 Difference]: Without dead ends: 2860 [2021-06-05 15:10:24,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1523.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:10:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-06-05 15:10:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1325. [2021-06-05 15:10:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.4040785498489425) internal successors, (3183), 1324 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3183 transitions. [2021-06-05 15:10:24,733 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3183 transitions. Word has length 30 [2021-06-05 15:10:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:24,733 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 3183 transitions. [2021-06-05 15:10:24,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3183 transitions. [2021-06-05 15:10:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:24,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:24,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:24,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:24,935 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:24,935 INFO L82 PathProgramCache]: Analyzing trace with hash -457303797, now seen corresponding path program 105 times [2021-06-05 15:10:24,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:24,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988869890] [2021-06-05 15:10:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:25,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:25,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988869890] [2021-06-05 15:10:25,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988869890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:25,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142885994] [2021-06-05 15:10:25,237 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:25,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:10:25,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:25,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:25,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:25,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:10:25,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:25,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:25,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:25,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 15:10:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:25,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142885994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:25,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:25,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 15:10:25,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203937961] [2021-06-05 15:10:25,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:10:25,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:25,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:10:25,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:10:25,647 INFO L87 Difference]: Start difference. First operand 1325 states and 3183 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:27,072 INFO L93 Difference]: Finished difference Result 2761 states and 6759 transitions. [2021-06-05 15:10:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:27,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:27,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:27,075 INFO L225 Difference]: With dead ends: 2761 [2021-06-05 15:10:27,075 INFO L226 Difference]: Without dead ends: 2752 [2021-06-05 15:10:27,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1182.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:10:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-06-05 15:10:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1320. [2021-06-05 15:10:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 2.404852160727824) internal successors, (3172), 1319 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3172 transitions. [2021-06-05 15:10:27,091 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3172 transitions. Word has length 30 [2021-06-05 15:10:27,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:27,091 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 3172 transitions. [2021-06-05 15:10:27,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3172 transitions. [2021-06-05 15:10:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:27,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:27,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:27,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:27,292 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash -642395277, now seen corresponding path program 105 times [2021-06-05 15:10:27,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:27,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312373692] [2021-06-05 15:10:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:27,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:27,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312373692] [2021-06-05 15:10:27,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312373692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:27,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418968475] [2021-06-05 15:10:27,626 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:27,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:10:27,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:27,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:27,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:27,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:27,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:27,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:27,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:27,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:10:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:27,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418968475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:27,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:27,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:10:27,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648934878] [2021-06-05 15:10:27,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:27,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:27,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:27,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:27,976 INFO L87 Difference]: Start difference. First operand 1320 states and 3172 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:32,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:32,841 INFO L93 Difference]: Finished difference Result 2899 states and 7054 transitions. [2021-06-05 15:10:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:10:32,841 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:32,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:32,844 INFO L225 Difference]: With dead ends: 2899 [2021-06-05 15:10:32,844 INFO L226 Difference]: Without dead ends: 2871 [2021-06-05 15:10:32,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 3887.0ms TimeCoverageRelationStatistics Valid=788, Invalid=3634, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:10:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-06-05 15:10:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 1311. [2021-06-05 15:10:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 2.404580152671756) internal successors, (3150), 1310 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 3150 transitions. [2021-06-05 15:10:32,859 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 3150 transitions. Word has length 30 [2021-06-05 15:10:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:32,859 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 3150 transitions. [2021-06-05 15:10:32,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 3150 transitions. [2021-06-05 15:10:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:32,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:32,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:33,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 15:10:33,061 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash -953230119, now seen corresponding path program 106 times [2021-06-05 15:10:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:33,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164736575] [2021-06-05 15:10:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:33,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:33,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164736575] [2021-06-05 15:10:33,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164736575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:33,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479292859] [2021-06-05 15:10:33,472 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:33,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:33,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:33,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:33,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:33,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:33,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:33,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:33,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:33,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:10:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:33,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479292859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:33,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:33,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:10:33,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68843714] [2021-06-05 15:10:33,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:33,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:33,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:33,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:33,823 INFO L87 Difference]: Start difference. First operand 1311 states and 3150 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,725 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-05 15:10:37,419 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 15:10:38,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:38,504 INFO L93 Difference]: Finished difference Result 2816 states and 6861 transitions. [2021-06-05 15:10:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:10:38,504 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:38,507 INFO L225 Difference]: With dead ends: 2816 [2021-06-05 15:10:38,507 INFO L226 Difference]: Without dead ends: 2800 [2021-06-05 15:10:38,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 3948.5ms TimeCoverageRelationStatistics Valid=799, Invalid=4313, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:10:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-06-05 15:10:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1300. [2021-06-05 15:10:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.405696689761355) internal successors, (3125), 1299 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) [2021-06-05 15:10:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3125 transitions. [2021-06-05 15:10:38,522 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3125 transitions. Word has length 30 [2021-06-05 15:10:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:38,522 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 3125 transitions. [2021-06-05 15:10:38,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3125 transitions. [2021-06-05 15:10:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:38,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:38,523 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:38,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 15:10:38,729 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:38,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:38,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2146780385, now seen corresponding path program 106 times [2021-06-05 15:10:38,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:38,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64166747] [2021-06-05 15:10:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:39,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:39,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64166747] [2021-06-05 15:10:39,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64166747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:39,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117035073] [2021-06-05 15:10:39,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:39,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:39,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:39,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:39,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:39,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:10:39,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:39,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:39,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:39,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 15:10:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:39,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117035073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:39,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:39,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 15:10:39,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679711369] [2021-06-05 15:10:39,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:39,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:39,462 INFO L87 Difference]: Start difference. First operand 1300 states and 3125 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:44,375 INFO L93 Difference]: Finished difference Result 2958 states and 7213 transitions. [2021-06-05 15:10:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:10:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:44,378 INFO L225 Difference]: With dead ends: 2958 [2021-06-05 15:10:44,378 INFO L226 Difference]: Without dead ends: 2940 [2021-06-05 15:10:44,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 3909.7ms TimeCoverageRelationStatistics Valid=836, Invalid=3856, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:10:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-06-05 15:10:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 1281. [2021-06-05 15:10:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.403125) internal successors, (3076), 1280 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3076 transitions. [2021-06-05 15:10:44,394 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3076 transitions. Word has length 30 [2021-06-05 15:10:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:44,394 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 3076 transitions. [2021-06-05 15:10:44,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3076 transitions. [2021-06-05 15:10:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:44,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:44,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:44,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-06-05 15:10:44,595 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1287495927, now seen corresponding path program 107 times [2021-06-05 15:10:44,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:44,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386616390] [2021-06-05 15:10:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:44,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:44,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386616390] [2021-06-05 15:10:44,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386616390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:44,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144942726] [2021-06-05 15:10:44,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:44,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:10:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:44,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:44,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:45,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:45,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:10:45,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:45,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:45,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:45,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 15:10:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:45,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144942726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:45,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:45,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 15:10:45,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489047538] [2021-06-05 15:10:45,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:45,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:45,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:45,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:45,197 INFO L87 Difference]: Start difference. First operand 1281 states and 3076 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:47,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:47,258 INFO L93 Difference]: Finished difference Result 2902 states and 7138 transitions. [2021-06-05 15:10:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:10:47,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:47,261 INFO L225 Difference]: With dead ends: 2902 [2021-06-05 15:10:47,261 INFO L226 Difference]: Without dead ends: 2881 [2021-06-05 15:10:47,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1512.4ms TimeCoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:10:47,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-06-05 15:10:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 1245. [2021-06-05 15:10:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 2.40032154340836) internal successors, (2986), 1244 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 2986 transitions. [2021-06-05 15:10:47,278 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 2986 transitions. Word has length 30 [2021-06-05 15:10:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:47,278 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 2986 transitions. [2021-06-05 15:10:47,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 2986 transitions. [2021-06-05 15:10:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:47,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:47,279 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:47,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:47,479 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:47,480 INFO L82 PathProgramCache]: Analyzing trace with hash 392509123, now seen corresponding path program 108 times [2021-06-05 15:10:47,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:47,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869048211] [2021-06-05 15:10:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:47,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:47,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869048211] [2021-06-05 15:10:47,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869048211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:47,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876557645] [2021-06-05 15:10:47,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:47,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:10:47,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:47,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:48,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:48,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:48,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:48,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:48,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:10:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:48,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876557645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:48,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:48,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 15:10:48,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190847714] [2021-06-05 15:10:48,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:48,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:48,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:48,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:48,114 INFO L87 Difference]: Start difference. First operand 1245 states and 2986 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:10:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:10:49,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 15:10:49,730 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:10:49,732 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:10:49,733 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:10:49,734 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:10:49 BasicIcfg [2021-06-05 15:10:49,734 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:10:49,734 INFO L168 Benchmark]: Toolchain (without parser) took 835874.80 ms. Allocated memory was 383.8 MB in the beginning and 461.4 MB in the end (delta: 77.6 MB). Free memory was 362.8 MB in the beginning and 289.7 MB in the end (delta: 73.1 MB). Peak memory consumption was 153.3 MB. Max. memory is 16.0 GB. [2021-06-05 15:10:49,734 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 383.8 MB. Free memory was 364.0 MB in the beginning and 363.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:10:49,734 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.51 ms. Allocated memory is still 383.8 MB. Free memory was 362.7 MB in the beginning and 361.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:10:49,734 INFO L168 Benchmark]: Boogie Preprocessor took 17.26 ms. Allocated memory is still 383.8 MB. Free memory was 361.3 MB in the beginning and 360.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:10:49,734 INFO L168 Benchmark]: RCFGBuilder took 176.51 ms. Allocated memory is still 383.8 MB. Free memory was 360.2 MB in the beginning and 348.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 15:10:49,734 INFO L168 Benchmark]: TraceAbstraction took 835655.84 ms. Allocated memory was 383.8 MB in the beginning and 461.4 MB in the end (delta: 77.6 MB). Free memory was 347.9 MB in the beginning and 289.7 MB in the end (delta: 58.2 MB). Peak memory consumption was 136.5 MB. Max. memory is 16.0 GB. [2021-06-05 15:10:49,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 383.8 MB. Free memory was 364.0 MB in the beginning and 363.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.51 ms. Allocated memory is still 383.8 MB. Free memory was 362.7 MB in the beginning and 361.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.26 ms. Allocated memory is still 383.8 MB. Free memory was 361.3 MB in the beginning and 360.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 176.51 ms. Allocated memory is still 383.8 MB. Free memory was 360.2 MB in the beginning and 348.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 835655.84 ms. Allocated memory was 383.8 MB in the beginning and 461.4 MB in the end (delta: 77.6 MB). Free memory was 347.9 MB in the beginning and 289.7 MB in the end (delta: 58.2 MB). Peak memory consumption was 136.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1245states) and FLOYD_HOARE automaton (currently 25 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (995 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1245states) and FLOYD_HOARE automaton (currently 25 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (995 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1245states) and FLOYD_HOARE automaton (currently 25 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (995 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 835594.6ms, OverallIterations: 310, TraceHistogramMax: 2, EmptinessCheckTime: 312.8ms, AutomataDifference: 603733.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8722 SDtfs, 81864 SDslu, 69094 SDs, 0 SdLazy, 388187 SolverSat, 42379 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 280111.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20026 GetRequests, 6209 SyntacticMatches, 1010 SemanticMatches, 12807 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173699 ImplicationChecksByTransitivity, 400628.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1364occurred in iteration=299, InterpolantAutomatonStates: 10304, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4149.3ms AutomataMinimizationTime, 309 MinimizatonAttempts, 430847 StatesRemovedByMinimization, 309 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 823.1ms SsaConstructionTime, 2527.1ms SatisfiabilityAnalysisTime, 155759.3ms InterpolantComputationTime, 18098 NumberOfCodeBlocks, 18086 NumberOfCodeBlocksAsserted, 1111 NumberOfCheckSat, 17480 ConstructedInterpolants, 140 QuantifiedInterpolants, 374598 SizeOfPredicates, 2248 NumberOfNonLiveVariables, 18716 ConjunctsInSsa, 9230 ConjunctsInUnsatCore, 618 InterpolantComputations, 2 PerfectInterpolantSequences, 89/6701 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown